x86: Remove superfluous NULL pointer check in destroy_irq()
x86: Remove superfluous NULL pointer check in destroy_irq()

This takes care of the following entry from Dan's list:

  arch/x86/kernel/apic/io_apic.c +3241 destroy_irq(11) warning: variable derefenced before check 'desc'

Reported-by: Dan Carpenter <72501f147b2753e6660fdce744d9ac3084854f5e@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <248de9df611a028e5eceb9d893a2ed6c24c89ef4@gmail.com>
Cc: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>
Cc: Eugene Teo <7309b697775012018e7eb9bd23aec73178becc3f@redhat.com>
Cc: Julia Lawall <b43b0ad1e8108e7ab870d7a54feac93ae8b8600e@diku.dk>
LKML-Reference: <200907302321.19086.248de9df611a028e5eceb9d893a2ed6c24c89ef4@gmail.com>
Signed-off-by: Ingo Molnar <9dbbbf0688fedc85ad4da37637f1a64b8c718ee2@elte.hu>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas