commit.c: fix a memory leak

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/commit.c b/builtin/commit.c
index 961e467..da79ac4 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -229,7 +229,7 @@
 static int list_paths(struct string_list *list, const char *with_tree,
 		      const char *prefix, const struct pathspec *pattern)
 {
-	int i;
+	int i, ret;
 	char *m;
 
 	if (!pattern->nr)
@@ -256,7 +256,9 @@
 			item->util = item; /* better a valid pointer than a fake one */
 	}
 
-	return report_path_error(m, pattern, prefix);
+	ret = report_path_error(m, pattern, prefix);
+	free(m);
+	return ret;
 }
 
 static void add_remove_files(struct string_list *list)