workaround repaint bug in windows by drawing into a subwindow instead of directly in the frame
workaround repaint bug in windows by drawing into a subwindow instead of directly in the frame

darcs-hash:20060909163233-f546f-27af5073650e0355052d6756c72aeb62113f7076.gz

nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf