vmware-vga: use vmsvga_verify_rect in vmsvga_fill_rect

Add verification to vmsvga_fill_rect, re-enable HW_FILL_ACCEL.

Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Don Koch <dkoch@verizon.com>