free null cleanup finale

Don't check for NULL before calling OPENSSL_free

Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/apps/genpkey.c b/apps/genpkey.c
index ae68e7a..de14bd3 100644
--- a/apps/genpkey.c
+++ b/apps/genpkey.c
@@ -235,8 +235,7 @@
     EVP_PKEY_CTX_free(ctx);
     BIO_free_all(out);
     BIO_free(in);
-    if (pass)
-        OPENSSL_free(pass);
+    OPENSSL_free(pass);
 
     return ret;
 }