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troff: avoid crash if home == NULL

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R=rsc
http://codereview.appspot.com/181070
This commit is contained in:
Russ Cox 2009-12-27 09:22:43 -08:00
parent 7351eea28e
commit 6530d37d7f
1 changed files with 2 additions and 1 deletions
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1
src/cmd/troff/dwbinit.c
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@ -189,6 +189,7 @@ char *DWBhome(void)
if ( (home = DWBHOME) == NULL || *home == '\0' || *home == ' ' )
home = NULL;
} /* End if */
if ( home != NULL )
home = unsharp(home);
} /* End if */