fix JNI float argument passing
fix JNI float argument passing

Floats are implicitly promoted to doubles when passed as part of a
variable-length argument list, so we can't treat them the same way as
32-bit integers.

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