Fix build on Ubuntu "error: ‘isnan’ was not declared in this scope"
Fix build on Ubuntu
"error: ‘isnan’ was not declared in this scope"

master312/AscEmu,master312/AscEmu,AscEmu/AscEmu,master312/AscEmu,master312/AscEmu,Appled/AscEmu,master312/AscEmu,Appled/AscEmu,AscEmu/AscEmu,Appled/AscEmu,master312/AscEmu,AscEmu/AscEmu