Merge branch 'jh/untracked-cache-fix'

An under-allocation for the untracked cache data has been corrected.

* jh/untracked-cache-fix:
  dir: fix malloc of root untracked_cache_dir

Author: gitster

dir.c

@@ -2730,11 +2730,8 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
 		return NULL;
 	}
 
-	if (!dir->untracked->root) {
-		const int len = sizeof(*dir->untracked->root);
-		dir->untracked->root = xmalloc(len);
-		memset(dir->untracked->root, 0, len);
-	}
+	if (!dir->untracked->root)
+		FLEX_ALLOC_STR(dir->untracked->root, name, "");
 
 	/* Validate $GIT_DIR/info/exclude and core.excludesfile */
 	root = dir->untracked->root;