Fix a memory leak in register_group_feature when attempting to register

a feature without specifying a group or feature to register.

(closes issue #13101)
Reported by: eliel
Patches:
      features.c.patch uploaded by eliel (license 64)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@131717 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/features.c

@@ -1498,14 +1498,6 @@ static void register_group_feature(struct feature_group *fg, const char *exten,
 {
 	struct feature_group_exten *fge;
 
-	if (!(fge = ast_calloc(1, sizeof(*fge))))
-		return;
-
-	if (ast_string_field_init(fge, 128)) {
-		ast_free(fge);
-		return;
-	}
-
 	if (!fg) {
 		ast_log(LOG_NOTICE, "You didn't pass a group!\n");
 		return;
@@ -1516,7 +1508,15 @@ static void register_group_feature(struct feature_group *fg, const char *exten,
 		return;
 	}
 
-	ast_string_field_set(fge, exten, (ast_strlen_zero(exten) ? feature->exten : exten));
+	if (!(fge = ast_calloc(1, sizeof(*fge))))
+		return;
+
+	if (ast_string_field_init(fge, 128)) {
+		ast_free(fge);
+		return;
+	}
+
+	ast_string_field_set(fge, exten, S_OR(exten, feature->exten));
 
 	fge->feature = feature;