pkt-line: fix packet_read_line() to handle len < 0 errors

diff --git a/pkt-line.c b/pkt-line.c
index d4b6bfe076341d64bb948e4932655b927a369bc0..6f05b1a4a8bea31686f50ea906987a701148f166 100644 (file)
--- a/pkt-line.c
+++ b/pkt-line.c
@@ -315,7 +315,7 @@ static char *packet_read_line_generic(int fd,
                              PACKET_READ_CHOMP_NEWLINE);
        if (dst_len)
                *dst_len = len;
-       return len ? packet_buffer : NULL;
+       return (len > 0) ? packet_buffer : NULL;
 }
 
 char *packet_read_line(int fd, int *len_p)