Accept NULL in *_free.

diff --git a/crypto/asn1/p7_lib.c b/crypto/asn1/p7_lib.c
index 06e1da4..4ab6477 100644
--- a/crypto/asn1/p7_lib.c
+++ b/crypto/asn1/p7_lib.c

@@ -267,6 +267,9 @@
 void PKCS7_content_free(a)
 PKCS7 *a;
 	{
+	if(a == NULL)
+	    return;
+
 	if (a->asn1 != NULL) Free((char *)a->asn1);
 
 	if (a->d.ptr != NULL)

diff --git a/crypto/asn1/x_name.c b/crypto/asn1/x_name.c
index 3b8bc51..3af14c8 100644
--- a/crypto/asn1/x_name.c
+++ b/crypto/asn1/x_name.c

@@ -263,6 +263,9 @@
 void X509_NAME_free(a)
 X509_NAME *a;
 	{
+	if(a == NULL)
+	    return;
+
 	BUF_MEM_free(a->bytes);
 	sk_pop_free(a->entries,X509_NAME_ENTRY_free);
 	Free((char *)a);

diff --git a/crypto/bio/b_sock.c b/crypto/bio/b_sock.c
index 2c36150..402439c 100644
--- a/crypto/bio/b_sock.c
+++ b/crypto/bio/b_sock.c

@@ -310,6 +310,9 @@
 	{
 	int i;
 
+	if(a == NULL)
+	    return;
+
 	if (a->h_aliases != NULL)
 		{
 		for (i=0; a->h_aliases[i] != NULL; i++)

diff --git a/crypto/bio/bss_acpt.c b/crypto/bio/bss_acpt.c
index 872807d..ecdd170 100644
--- a/crypto/bio/bss_acpt.c
+++ b/crypto/bio/bss_acpt.c

@@ -173,6 +173,9 @@
 void BIO_ACCEPT_free(a)
 BIO_ACCEPT *a;
 	{
+	if(a == NULL)
+	    return;
+
 	if (a->param_addr != NULL) Free(a->param_addr);
 	if (a->addr != NULL) Free(a->addr);
 	if (a->bio_chain != NULL) BIO_free(a->bio_chain);

diff --git a/crypto/bio/bss_conn.c b/crypto/bio/bss_conn.c
index 3ec1388..b90fea1 100644
--- a/crypto/bio/bss_conn.c
+++ b/crypto/bio/bss_conn.c

@@ -357,6 +357,9 @@
 void BIO_CONNECT_free(a)
 BIO_CONNECT *a;
 	{
+	if(a == NULL)
+	    return;
+
 	if (a->param_hostname != NULL)
 		Free(a->param_hostname);
 	if (a->param_port != NULL)

diff --git a/crypto/bn/bn_blind.c b/crypto/bn/bn_blind.c
index 35be32b..c247f71 100644
--- a/crypto/bn/bn_blind.c
+++ b/crypto/bn/bn_blind.c

@@ -90,6 +90,9 @@
 void BN_BLINDING_free(r)
 BN_BLINDING *r;
 	{
+	if(r == NULL)
+	    return;
+
 	if (r->A  != NULL) BN_free(r->A );
 	if (r->Ai != NULL) BN_free(r->Ai);
 	Free(r);

diff --git a/crypto/bn/bn_lib.c b/crypto/bn/bn_lib.c
index c027d0b..d8d2c32 100644
--- a/crypto/bn/bn_lib.c
+++ b/crypto/bn/bn_lib.c

@@ -341,6 +341,9 @@
 	{
 	int i;
 
+	if(c == NULL)
+	    return;
+
 	for (i=0; i<BN_CTX_NUM; i++)
 		BN_clear_free(&(c->bn[i]));
 	if (c->flags & BN_FLG_MALLOCED)

diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c
index a5640b5..2215dc3 100644
--- a/crypto/bn/bn_mont.c
+++ b/crypto/bn/bn_mont.c

@@ -289,6 +289,9 @@
 void BN_MONT_CTX_free(mont)
 BN_MONT_CTX *mont;
 	{
+	if(mont == NULL)
+	    return;
+
 	BN_free(&(mont->RR));
 	BN_free(&(mont->N));
 	BN_free(&(mont->Ni));

diff --git a/crypto/bn/bn_recp.c b/crypto/bn/bn_recp.c
index 97ca857..3ace566 100644
--- a/crypto/bn/bn_recp.c
+++ b/crypto/bn/bn_recp.c

@@ -84,6 +84,9 @@
 void BN_RECP_CTX_free(recp)
 BN_RECP_CTX *recp;
 	{
+	if(recp == NULL)
+	    return;
+
 	BN_free(&(recp->N));
 	BN_free(&(recp->Nr));
 	if (recp->flags & BN_FLG_MALLOCED)

diff --git a/crypto/buffer/buffer.c b/crypto/buffer/buffer.c
index 7e8af9e..b160a74 100644
--- a/crypto/buffer/buffer.c
+++ b/crypto/buffer/buffer.c

@@ -79,6 +79,9 @@
 void BUF_MEM_free(a)
 BUF_MEM *a;
 	{
+	if(a == NULL)
+	    return;
+
 	if (a->data != NULL)
 		{
 		memset(a->data,0,(unsigned int)a->max);

diff --git a/crypto/comp/comp_lib.c b/crypto/comp/comp_lib.c
index 8ce0695..dcacb55 100644
--- a/crypto/comp/comp_lib.c
+++ b/crypto/comp/comp_lib.c

@@ -33,6 +33,9 @@
 	{
 	/* CRYPTO_free_ex_data(rsa_meth,(char *)ctx,&ctx->ex_data); */
 
+	if(ctx == NULL)
+	    return;
+
 	if (ctx->meth->finish != NULL)
 		ctx->meth->finish(ctx);
 

diff --git a/crypto/err/err.c b/crypto/err/err.c
index 5cf6218..39c997a 100644
--- a/crypto/err/err.c
+++ b/crypto/err/err.c

@@ -175,6 +175,9 @@
 	{
 	int i;
 
+	if(s == NULL)
+	    return;
+
 	for (i=0; i<ERR_NUM_ERRORS; i++)
 		{
 		err_clear_data(s,i);

diff --git a/crypto/rsa/rsa_eay.c b/crypto/rsa/rsa_eay.c
index ec143e8..b405050 100644
--- a/crypto/rsa/rsa_eay.c
+++ b/crypto/rsa/rsa_eay.c

@@ -474,8 +474,7 @@
 err:
 	BN_clear_free(&m1);
 	BN_clear_free(&r1);
-	if(ctx)
-	    BN_CTX_free(ctx);
+	BN_CTX_free(ctx);
 	return(ret);
 	}
 

diff --git a/crypto/rsa/rsa_enc.c b/crypto/rsa/rsa_enc.c
index 5f91239..c4a4ad5 100644
--- a/crypto/rsa/rsa_enc.c
+++ b/crypto/rsa/rsa_enc.c

@@ -531,8 +531,7 @@
 err:
 	if (m1 != NULL) BN_free(m1);
 	if (r1 != NULL) BN_free(r1);
-	if(ctx != NULL)
-	    BN_CTX_free(ctx);
+	BN_CTX_free(ctx);
 	return(ret);
 	}
 

diff --git a/crypto/txt_db/txt_db.c b/crypto/txt_db/txt_db.c
index e4259d9..dccb2b9 100644
--- a/crypto/txt_db/txt_db.c
+++ b/crypto/txt_db/txt_db.c

@@ -356,6 +356,9 @@
 	int i,n;
 	char **p,*max;
 
+	if(db == NULL)
+	    return;
+
 	if (db->index != NULL)
 		{
 		for (i=db->num_fields-1; i>=0; i--)

diff --git a/crypto/x509/x509_lu.c b/crypto/x509/x509_lu.c
index deec5ad..8ea6819 100644
--- a/crypto/x509/x509_lu.c
+++ b/crypto/x509/x509_lu.c

@@ -259,6 +259,9 @@
 	STACK *sk;
 	X509_LOOKUP *lu;
 
+	if(vfy == NULL)
+	    return;
+
 	sk=vfy->get_cert_methods;
 	for (i=0; i<sk_num(sk); i++)
 		{