Merge pull request #4768 from abyss7/master

Fix leak in index.c

src/index.c

@@ -1802,7 +1802,8 @@ int git_index_conflict_add(git_index *index,
 		if (entries[i] && !valid_filemode(entries[i]->mode)) {
 			giterr_set(GITERR_INDEX, "invalid filemode for stage %d entry",
 				i + 1);
-			return -1;
+			ret = -1;
+			goto on_error;
 		}
 	}