CVS tadam: Fix BalloonWindows for "negative" desks.

[cvs]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     tadam   13/02/05 03:40:34

Modified files:
        modules        : Tag: branch-2_6 ChangeLog 
        modules/FvwmPager: Tag: branch-2_6 x_pager.c 

Log message:
Fix BalloonWindows for "negative" desks.

Don't let desk calculations screw up the pager.