Fix load-foreign-library bug
Fix load-foreign-library bug

load-foreign-library wasn't accepting non-symbol library designators
correctly. Bug reported by Stelian Ionescu.

marsijanin/cffi,akovalenko/cffi,kingcheez/cffi-cheez,dochang/cffi,wesen/cffi,wesen/cffi,stassats/cffi,dochang/cffi,mcna/cffi,cffi/cffi,marsijanin/cffi,dkochmanski/cffi,cffi/cffi,3b/cffi,kingcheez/cffi-cheez,akovalenko/cffi,wesen/cffi,stassats/cffi,mcna/cffi,stassats/cffi,dkochmanski/cffi,3b/cffi,attila-lendvai/cffi,akovalenko/cffi,3b/cffi,kingcheez/cffi-cheez,dkochmanski/cffi,marsijanin/cffi,attila-lendvai/cffi,dochang/cffi,cffi/cffi