x64 build - VC2012

[flyingdove]

64 bit building fails on Gwen.cpp:
error C4235: nonstandard extension used : '_asm' keyword not supported on this architecture

ifdef _WIN32

        MessageBoxA( NULL, strMsg, "Assert", MB_ICONEXCLAMATION | MB_OK );
        _asm { int 3 }

endif

and a lot of warnings like this:
warning C4267: 'return' : conversion from 'size_t' to 'int'

[Wizzard033]

Reference issue #61