input-raw: fix ts_read_mt for non-MT devices without pressure

We always use our "multitouch buffer" in read_mt - also for single touch
devices. We cannot check for real MT capabilities when setting the pressure
fallback values.

plugins/input-raw.c

@@ -202,7 +202,7 @@ static void set_pressure(struct tslib_input *i)
 
 	i->current_p = 255;
 
-	if (i->mt && i->buf) {
+	if (i->buf) {
 		for (j = 0; j < i->nr; j++) {
 			for (k = 0; k < i->max_slots; k++)
 				i->buf[j][k].pressure = 255;