last_rx_csum is unsigned.

diff --git a/gpsbabel/magproto.c b/gpsbabel/magproto.c
index 4d06e9eaf2dae4d1657b3477d6f82d2df7fa5897..5bc44b054e513c034dbe1641f4622c2315af9db8 100644 (file)
--- a/gpsbabel/magproto.c
+++ b/gpsbabel/magproto.c
@@ -72,7 +72,7 @@ static FILE *magfile_out;
 static int magfd;
 static mag_rxstate magrxstate;
 static int mag_error;
-static int last_rx_csum;
+static unsigned int last_rx_csum;
 static int found_done;
 static int got_version;
 static int is_file = 0;