netfilter: IDLETIMER: fix invalid deference of timer

"timer" was checked for null, but used later without being re-checked.

Change-Id: Ib4d08cd49860c9f157d1cac556705ba85cd44f4e
Reported-by: dan.carpenter@oracle.com
Signed-off-by: JP Abgrall <jpa@google.com>
Merged samsung patch to: WIFI, TIME, BT, AUDIT, USB, NET

Merge from @Alucard_24
https://github.com/Alucard24/Alucard-Kernel-jfltexx/commit/48763dfaa0c5b5e15df735b66d8a478431a179f5

 jf: kernel: merge I9505GUEUDNL3

Change-Id: Ic707296afd9992a00635f7ca6b845d25dce92fa2
Kernel 9.4
Merge remote-tracking branch 'do/LG-STOCK-KK' into LG-STOCK-KK

Conflicts:
	arch/arm/configs/dorimanx_d801_defconfig
	arch/arm/configs/dorimanx_d802_defconfig
	arch/arm/configs/dorimanx_f320_defconfig