Fix FLT_EPSILON undefinition
Fix FLT_EPSILON undefinition

RyanTech/OLImageView,duanhjlt/OLImageView,niuxinghua/OLImageView,dtorres/OLImageView,johnmyqin/OLImageView,ondalabs/OLImageView,hejunbinlan/OLImageView,tinyspeck/OLImageView,njuxjy/OLImageView,cockscomb/OLImageView,Kingside/OLImageView,rimarsh/OLImageView