Fix rtcwake when there is no cronjob

rtcwake can't take the default value of mnc when there is no cron job
cause it is too big.

We limit this value to 8 years, a working value.

Signed-off-by: Stacy Harper <contact@stacyharper.net>
Signed-off-by: Anjandev Momi <anjan@momi.ca>

scripts/core/sxmo_screenlock.sh

@@ -131,6 +131,9 @@ elif [ "$1" = "crust" ] ; then
 
 	xset dpms force off
 	suspend_time="$(($(mnc)-10))"
+	if [ "$suspend_time" -gt 268435455 ]; then
+		suspend_time=268435455
+	fi
 	if [ "$suspend_time" -gt 0 ]; then
 		rtcwake -m mem -s "$suspend_time"
 		UNSUSPENDREASON=$(whichWake)