Fix build error caused by enabled extra compiler warnings

 nmea.c:257:16: error: comparison between signed and
     unsigned integer expressions [-Werror=sign-compare]

Signed-off-by: Petr Štetiar <ynezz@true.cz>

1 files changed, 2 insertions, 1 deletions

diff --git a/nmea.c b/nmea.c
index 42be71e..e2b2937 100644
--- a/nmea.c
+++ b/nmea.c
@@ -233,7 +233,8 @@ static void
 nmea_process(char *a)
 {
 	char *csum;
-	int cnt, i;
+	int cnt;
+	unsigned int i;
 
 	if (strncmp(a, "$GP", 3))
 		return;