String.equalsIgnoreCase(): fix nullptrex.
String.equalsIgnoreCase(): fix nullptrex.

It's logical and conforms OpenJDK..
joshuawarner32/avian,lostdj/avian,minor-jason/avian,lostdj/avian,bgould/avian,lwahlmeier/avian,marcinolawski/avian,marcinolawski/avian,joshuawarner32/avian,lostdj/avian,MaartenR/avian,bigfatbrowncat/avian-pack.avian,MaartenR/avian,bigfatbrowncat/avian-pack.avian,ucdseniordesign/avian,ucdseniordesign/avian,lostdj/avian,lwahlmeier/avian,ucdseniordesign/avian,bgould/avian,marcinolawski/avian,bgould/avian,dicej/avian,bigfatbrowncat/avian-pack.avian,minor-jason/avian,dicej/avian,ucdseniordesign/avian,minor-jason/avian,joshuawarner32/avian,minor-jason/avian,lwahlmeier/avian,bigfatbrowncat/avian-pack.avian,lwahlmeier/avian,MaartenR/avian,dicej/avian,joshuawarner32/avian,marcinolawski/avian,MaartenR/avian,bgould/avian,dicej/avian