Fix casting of EGLNativeDisplayType, EGLNativeWindowType, EGLNativePixmapType

The EGLNativeDisplayType, EGLNativeWindowType, EGLNativePixmapType types should be cast using proper C++ casts, due to their definition in EGL/eglplatform.h being:

#define EGLNativeDisplayType void *
#define EGLNativeWindowType void *
#define EGLNativePixmapType void *

This leads to function-style casts, e.g. EGLNativeDisplayType(quintptr(defaultDisplay)), expanding to invalid code, void *(quintptr(defaultDisplay)) and breaking compilation. This needs a reinterpret_cast to work sensibly.