fix format string in loadLibrary call to snprintf
fix format string in loadLibrary call to snprintf

"%*s" means "at least", whereas "%.*s" means at most, and the latter
is what I intended.  This only became noticable as of 9f22a70, when I
added another directory to the library path, which caused loadLibrary
to fail to find libraries in either directory.

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