CVS domivogt: * Fix possible format string attacks with FVWM_MSG.

[cvs]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     domivogt        13/04/14 03:36:55

Modified files:
        .              : ChangeLog 
        fvwm           : builtins.c move_resize.c virtual.c 
        libs           : FRenderInit.c 

Log message:
* Fix possible format string attacks with FVWM_MSG.