apps/speed.c: Fix crash when config loading fails

Move rsa_key initialization in front of load_config().
If loading the config fails, rsa_key isn't initialized and may
cause invalid free() in the end: cleanup.
Remove superfluous memset.

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit c003851783ed05e3fd5296786e1f8f6a63dc4f31)

apps/speed.c

diff --git a/apps/speed.c b/apps/speed.c
index ef72723..7922473 100644
--- a/apps/speed.c
+++ b/apps/speed.c
@@ -666,6 +666,10 @@
         ecdh_b[i] = NULL;
     }
 # endif
+# ifndef OPENSSL_NO_RSA
+    for (i = 0; i < RSA_NUM; i++)
+        rsa_key[i] = NULL;
+# endif
 
     if (bio_err == NULL)
         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
@@ -674,12 +678,6 @@
     if (!load_config(bio_err, NULL))
         goto end;
 
-# ifndef OPENSSL_NO_RSA
-    memset(rsa_key, 0, sizeof(rsa_key));
-    for (i = 0; i < RSA_NUM; i++)
-        rsa_key[i] = NULL;
-# endif
-
     if ((buf = (unsigned char *)OPENSSL_malloc((int)BUFSIZE)) == NULL) {
         BIO_printf(bio_err, "out of memory\n");
         goto end;