Check for defines before defining to get rid of some warnings.
Check for defines before defining to get rid of some warnings.

mono/CppSharp,mydogisbox/CppSharp,txdv/CppSharp,nalkaro/CppSharp,Samana/CppSharp,Samana/CppSharp,KonajuGames/CppSharp,inordertotest/CppSharp,mydogisbox/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,SonyaSa/CppSharp,mono/CppSharp,mydogisbox/CppSharp,ktopouzi/CppSharp,mohtamohit/CppSharp,inordertotest/CppSharp,mydogisbox/CppSharp,mohtamohit/CppSharp,zillemarco/CppSharp,mydogisbox/CppSharp,genuinelucifer/CppSharp,txdv/CppSharp,nalkaro/CppSharp,u255436/CppSharp,inordertotest/CppSharp,mohtamohit/CppSharp,imazen/CppSharp,mohtamohit/CppSharp,KonajuGames/CppSharp,SonyaSa/CppSharp,u255436/CppSharp,KonajuGames/CppSharp,SonyaSa/CppSharp,mohtamohit/CppSharp,nalkaro/CppSharp,inordertotest/CppSharp,imazen/CppSharp,nalkaro/CppSharp,ddobrev/CppSharp,zillemarco/CppSharp,ddobrev/CppSharp,zillemarco/CppSharp,genuinelucifer/CppSharp,xistoso/CppSharp,u255436/CppSharp,genuinelucifer/CppSharp,KonajuGames/CppSharp,genuinelucifer/CppSharp,inordertotest/CppSharp,KonajuGames/CppSharp,txdv/CppSharp,imazen/CppSharp,u255436/CppSharp,SonyaSa/CppSharp,imazen/CppSharp,ktopouzi/CppSharp,imazen/CppSharp,zillemarco/CppSharp,nalkaro/CppSharp,xistoso/CppSharp,SonyaSa/CppSharp,u255436/CppSharp,ktopouzi/CppSharp,mono/CppSharp,ktopouzi/CppSharp,xistoso/CppSharp,txdv/CppSharp,txdv/CppSharp,Samana/CppSharp,mono/CppSharp,mono/CppSharp,ddobrev/CppSharp,Samana/CppSharp,genuinelucifer/CppSharp,xistoso/CppSharp,mono/CppSharp,xistoso/CppSharp,zillemarco/CppSharp,ktopouzi/CppSharp,Samana/CppSharp