CVS dane: Fix unbinding key bindings

[cvs]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     dane    13/12/18 19:41:32

Modified files:
        .              : Tag: branch-2_6 ChangeLog NEWS 
        fvwm           : Tag: branch-2_6 bindings.c menubindings.c 
        libs           : Tag: branch-2_6 Bindings.c Bindings.h 

Log message:
Fix unbinding key bindings