From 38da048d72e9c3a7895938d6f95bea3438f1711f Mon Sep 17 00:00:00 2001
From: robertl <robertl@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Date: Thu, 2 Nov 2006 19:15:48 +0000
Subject: [PATCH] Allow elapsed time to go negative so that NMEA line reader
 can detect timeouts correctly.

---
 gpsbabel/gbser_posix.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gpsbabel/gbser_posix.c b/gpsbabel/gbser_posix.c
index afbc5ba66..6e398c13f 100644
--- a/gpsbabel/gbser_posix.c
+++ b/gpsbabel/gbser_posix.c
@@ -404,8 +404,9 @@ 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;
         }
-- 
2.30.2