CVS tadam: Remove unnecessary strcasecmp()

[cvs]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     tadam   11/09/18 14:51:30

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

Log message:
Remove unnecessary strcasecmp()