Input: cma3000_d0x - fix signedness bug in cma3000_thread_irq()

The error check (intr_status < 0) didn't work because intr_status is
a u8.  Change its type to signed int.
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/misc/cma3000_d0x.c

@@ -114,8 +114,8 @@ static void decode_mg(struct cma3000_accl_data *data, int *datax,
 static irqreturn_t cma3000_thread_irq(int irq, void *dev_id)
 {
 	struct cma3000_accl_data *data = dev_id;
-	int datax, datay, dataz;
-	u8 ctrl, mode, range, intr_status;
+	int datax, datay, dataz, intr_status;
+	u8 ctrl, mode, range;
 
 	intr_status = CMA3000_READ(data, CMA3000_INTSTATUS, "interrupt status");
 	if (intr_status < 0)