GL/GLES targets crash intermittently on 64bit startp

[jeske]

eglGetDisplay(int) needs to be eglGetDisplay(IntPtr) - eglGetDisplay(NativeDisplayType*)

This causes crashes (intermittently, depending on prior code) on startup in 64bit as the other half of the 32bit int paramater is undefined.

Fixed by:

#71

[smoogipoo]

Fixed in #71