CVS griph: fixed typo (NEWS said 2.5.15 on two places)

[FVWM CVS]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     griph   06/01/14 04:16:31

Modified files:
        .              : ChangeLog NEWS 

Log message:
fixed typo (NEWS said 2.5.15 on two places)