If memory debugging enabled return error on leaks.

Reviewed-by: Rich Salz <rsalz@openssl.org>

test/evp_extra_test.c

diff --git a/test/evp_extra_test.c b/test/evp_extra_test.c
index 13dd262..53844ad 100644
--- a/test/evp_extra_test.c
+++ b/test/evp_extra_test.c
@@ -467,7 +467,8 @@
     ERR_remove_thread_state(NULL);
     ERR_free_strings();
 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
-    CRYPTO_mem_leaks_fp(stderr);
+    if (CRYPTO_mem_leaks_fp(stderr) <= 0)
+        return 1;
 #endif
 
     printf("PASS\n");