Temporary solution to mouse cursor crop issue

Cropping in OBS causes the sprite drawing function to crop any texture
drawn.  Because things like mouse cursors can be drawn separately, they
also have crop applied, which is kind of bad.  We shouldn't really be
cropping this way -- we should be using some math to intelligently cut
off the separate textures, but OBS1 can't really handle that properly
due to

Because crop also applies to the mouse cursors, any crop larger than the
mouse cursor could cause the cursor to draw incorrectly.  This
workaround just prevents drawing the mouse cursor if it's larger than
the mouse cursor.