==== Other fixes / imporvements ===

* GR_Win32CairoGraphics::genImageFromRectangle(const UT_Rect&)
Refactoring needed, take advantake of cairo. The current implementation comes
from GR_Win32Graphics

* check _beginPaint & _endPaint

* check the leaking resource issue in gr_Win32CairoGraphics::setCursor.

* check GR_Win32CairoGraphics::getGUIFont(void)

==== BUGS ====