Fix pesky compiler warning on unused variable in linux.
Fix pesky compiler warning on unused variable in linux.

lwahlmeier/avian,badlogic/avian,lostdj/avian,joshuawarner32/avian,marcinolawski/avian,joshuawarner32/avian,lwahlmeier/avian,ucdseniordesign/avian,lostdj/avian,dicej/avian,badlogic/avian,minor-jason/avian,minor-jason/avian,ucdseniordesign/avian,joshuawarner32/avian,minor-jason/avian,ucdseniordesign/avian,bgould/avian,dicej/avian,getlantern/avian,getlantern/avian,marcinolawski/avian,bigfatbrowncat/avian-pack.avian,lwahlmeier/avian,MaartenR/avian,ucdseniordesign/avian,bigfatbrowncat/avian-pack.avian,marcinolawski/avian,MaartenR/avian,getlantern/avian,MaartenR/avian,MaartenR/avian,lwahlmeier/avian,badlogic/avian,bigfatbrowncat/avian-pack.avian,bgould/avian,lostdj/avian,badlogic/avian,minor-jason/avian,bigfatbrowncat/avian-pack.avian,marcinolawski/avian,lostdj/avian,getlantern/avian,bgould/avian,dicej/avian,dicej/avian,joshuawarner32/avian,bgould/avian