crypto/engine/eng_list.c: compare getenv rv to NULL instead of 0
@@ -317,7 +317,7 @@ ENGINE *ENGINE_by_id(const char *id)
* Prevent infinite recursion if we're looking for the dynamic engine.
*/
if (strcmp(id, "dynamic")) {
- if ((load_dir = getenv("OPENSSL_ENGINES")) == 0)
+ if ((load_dir = getenv("OPENSSL_ENGINES")) == NULL)
load_dir = ENGINESDIR;
iterator = ENGINE_by_id("dynamic");
if (!iterator || !ENGINE_ctrl_cmd_string(iterator, "ID", id, 0) ||
