Fix crash if no avian.boostrap is specified (oops)
Fix crash if no avian.boostrap is specified (oops)

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