In gpsmon, fix control sending to actually work again.

mike_t reports that SiRF mode sets stopped working after 2.95,  Ge bisected
to a commit that made the driver respect the readonly flag, which gpsmon
wasn't clearing at the right time.

1 files changed, 2 insertions, 0 deletions

diff --git a/gpsmon.c b/gpsmon.c
index 977ab5df..7023222f 100644
--- a/gpsmon.c
+++ b/gpsmon.c
@@ -325,7 +325,9 @@ bool monitor_control_send( /*@in@*/ unsigned char *buf, size_t len)
 	    session.gpsdata.gps_fd = controlfd;
 	}
 
+	context.readonly = false;
 	st = (*active)->driver->control_send(&session, (char *)buf, len);
+	context.readonly = true;
 
 	if (!serial) {
 	    /* stop pretending now */