Missing cirrus_invalidate_region() in cirrus_do_copy() (Brian Kress)

Missing cirrus_invalidate_region() in cirrus_do_copy() (Brian Kress)

After doing a video to video copy, cirrus_do_copy() in cirrus_vga.c does a
conditional call to cirrus_invalidate_region() with an "if (!notify)" test.
However at this point the blt has already been done so it seems like this call
should be made unconditionally.  The patch below fixes some display update
problems when dragging windows under both X (fedora 10 guest) and a Windows XP
guest.

Signed-off-by: Brian Kress <kressb@moose.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6646 c046a42c-6fe2-441c-8c8c-71466251a162