CVS: cvs.openbsd.org: src

[Nicholas Marriott]

CVSROOT:        /cvs
Module name:    src
Changes by:     n...@cvs.openbsd.org    2015/10/27 03:18:06

Modified files:
        usr.bin/tmux   : format.c 

Log message:
The format callback may not always succeed, so we need to check for
NULL. From Patrick Palka.