libsemanage: Fix USE_AFTER_FREE (CWE-672) in semanage_direct_get_module_info()

>From fclose(3):
Upon successful completion, 0 is returned.  Otherwise, EOF is returned
and errno is set to indicate the error. In either case, any further
access (including another call to fclose()) to the stream results in
undefined behavior.

Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Acked-by: James Carter <jwcart2@gmail.com>

libsemanage/src/direct_api.c

@@ -2293,6 +2293,7 @@ static int semanage_direct_get_module_info(semanage_handle_t *sh,
 	tmp = NULL;
 
 	if (fclose(fp) != 0) {
+		fp = NULL;
 		ERR(sh,
 		    "Unable to close %s module lang ext file.",
 		    (*modinfo)->name);