tikme_left in gbser_read_line can be negative - in fact, we depend on it

for read timeouts to work...

diff --git a/gbser_win.c b/gbser_win.c
index 5b984ed824898a58a824b9e959d65f2664bd75d6..7c2fba2f105914b7f9b2de8d6e2351456e141f04 100644 (file)
--- a/gbser_win.c
+++ b/gbser_win.c
@@ -406,7 +406,7 @@ int gbser_read_line(void *handle, void *buf,
     get_time(&tv);
     bp[pos] = '\0';
     for (;;) {
-        unsigned time_left = ms - elapsed(&tv);
+        signed time_left = ms - elapsed(&tv);
         int c;
         if (time_left <= 0) {
             return gbser_TIMEOUT;