cansequence.c: add extended identifier flag to mask

Without this, the extended identifier flag was not important when
filtering on CAN frames. Add this to mask to only receive the frame type
we want to recieve.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

cansequence.c

@@ -334,6 +334,7 @@ int main(int argc, char **argv)
 		filter->can_id  &= CAN_SFF_MASK;
 	}
 	frame.can_id = filter->can_id;
+	filter->can_mask |= CAN_EFF_FLAG;
 
 	printf("interface = %s, family = %d, type = %d, proto = %d\n",
 	       interface, family, type, proto);