Don't assume userdata starts at -1
Don't assume userdata starts at -1

kidaa/luv,RomeroMalaquias/luv,daurnimator/luv,kidaa/luv,joerg-krause/luv,brimworks/luv,DBarney/luv,RomeroMalaquias/luv,NanXiao/luv,xpol/luv,RomeroMalaquias/luv,daurnimator/luv,DBarney/luv,zhaozg/luv,zhaozg/luv,xpol/luv,luvit/luv,mkschreder/luv,joerg-krause/luv,luvit/luv,daurnimator/luv,leecrest/luv,leecrest/luv,mkschreder/luv,NanXiao/luv,brimworks/luv