ugps: fix 64-bit time_t

The abs function takes a 32-bit int, which can cause truncation. Fixes
compilation error:

error: absolute value function 'abs' given an argu>
if ((sec < 0) || (abs(cur.tv_sec - tv.tv_sec) > MAX_TIME_OFFSET)) {

Signed-off-by: Rosen Penev <rosenp@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/nmea.c b/nmea.c
index 8df7792..1204c20 100644
--- a/nmea.c
+++ b/nmea.c
@@ -107,7 +107,7 @@ nmea_rmc_cb(void)
 
 			gettimeofday(&cur, NULL);
 
-			if ((sec < 0) || (abs(cur.tv_sec - sec) > MAX_TIME_OFFSET)) {
+			if ((sec < 0) || (llabs(cur.tv_sec - sec) > MAX_TIME_OFFSET)) {
 				struct timeval tv = { 0 };
 				tv.tv_sec = sec;
 				if (++nmea_bad_time > MAX_BAD_TIME) {