CVS domivogt: * Preserve default layer over restart.

[FVWM CVS]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     domivogt        05/08/13 16:51:18

Modified files:
        .              : ChangeLog NEWS 
        fvwm           : session.c 

Log message:
* Preserve default layer over restart.