fix loop - size_t is unsigned so can not be negative

1 files changed, 4 insertions, 5 deletions

diff --git a/ext/standard/ftp_fopen_wrapper.c b/ext/standard/ftp_fopen_wrapper.c
index d6eb3b8fbc..ab75da713c 100644
--- a/ext/standard/ftp_fopen_wrapper.c
+++ b/ext/standard/ftp_fopen_wrapper.c
@@ -644,11 +644,10 @@ static size_t php_ftp_dirstream_read(php_stream *stream, char *buf, size_t count
 	efree(basename);
 
 	/* Trim off trailing whitespace characters */
-	tmp_len--;
-	while (tmp_len >= 0 &&
-			(ent->d_name[tmp_len] == '\n' || ent->d_name[tmp_len] == '\r' ||
-			 ent->d_name[tmp_len] == '\t' || ent->d_name[tmp_len] == ' ')) {
-		ent->d_name[tmp_len--] = '\0';
+	while (tmp_len > 0 &&
+			(ent->d_name[tmp_len - 1] == '\n' || ent->d_name[tmp_len - 1] == '\r' ||
+			 ent->d_name[tmp_len - 1] == '\t' || ent->d_name[tmp_len - 1] == ' ')) {
+		ent->d_name[--tmp_len] = '\0';
 	}
 
 	return sizeof(php_stream_dirent);