contrib/curl: Import fix for pollfd structure conflict
contrib/curl: Import fix for pollfd structure conflict

This fixes conflict of pollfd structure declaration with winsock2.h header file

premake/premake-core,starkos/premake-core,noresources/premake-core,noresources/premake-core,dcourtois/premake-core,noresources/premake-core,premake/premake-core,premake/premake-core,dcourtois/premake-core,dcourtois/premake-core,starkos/premake-core,starkos/premake-core,premake/premake-core,noresources/premake-core,noresources/premake-core,dcourtois/premake-core,dcourtois/premake-core,premake/premake-core,dcourtois/premake-core,dcourtois/premake-core,premake/premake-core,starkos/premake-core,premake/premake-core,noresources/premake-core,starkos/premake-core,noresources/premake-core,starkos/premake-core,starkos/premake-core