remove_dirs: do not swallow error when stat() failed

Without an error message when stat() failed, e.g. `git clean` would
abort without an error message, leaving the user quite puzzled.

This fixes #521

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

builtin/clean.c

@@ -204,7 +204,8 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 		strbuf_setlen(path, len);
 		strbuf_addstr(path, e->d_name);
 		if (lstat(path->buf, &st)) {
-			; /* fall thru */
+			warning("Could not stat path '%s': %s",
+				path->buf, strerror(errno));
 		} else if ((!prefix && skip_precious_file(&the_index, path->buf)) ||
 			   (prefix && skip_prefix(path->buf, prefix, &rel_path) &&
 			    skip_precious_file(&the_index, rel_path))) {