commit e3abff914d47a58865ef8384b2617fec2f74a9fd
Author: Gustavo Pichorim Boiko <boiko@mandriva.com>
Date:   Fri Mar 30 16:41:07 2007 -0300

    Check the drawable state when getting the lock
    
    If the window was moved or resized, the drawable should be updated.

diff --git a/src/mesa/drivers/dri/mga/mga_xmesa.c b/src/mesa/drivers/dri/mga/mga_xmesa.c
index ca2c8fa..85535d4 100644
--- a/src/mesa/drivers/dri/mga/mga_xmesa.c
+++ b/src/mesa/drivers/dri/mga/mga_xmesa.c
@@ -910,6 +910,7 @@ void mgaGetLock( mgaContextPtr mmesa, GL
 
    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 
+   DRI_VALIDATE_DRAWABLE_INFO( mmesa->driScreen, dPriv );
    if (*(dPriv->pStamp) != mmesa->lastStamp) {
       mmesa->lastStamp = *(dPriv->pStamp);
       mmesa->SetupNewInputs |= VERT_BIT_POS;