plan9port

commit 6530d37d7f3f6d00527a71ba8a02c536c28b5d9f
parent 7351eea28ed2d396ca524bb0164501aaca857e8f
Author: Russ Cox <rsc@swtch.com>
Date:   Sun, 27 Dec 2009 09:22:43 -0800

troff: avoid crash if home == NULL

R=rsc
http://codereview.appspot.com/181070

Diffstat:
M
src/cmd/troff/dwbinit.c
 | 
3
++-

1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/cmd/troff/dwbinit.c b/src/cmd/troff/dwbinit.c
@@ -189,7 +189,8 @@ char *DWBhome(void)
 	    if ( (home = DWBHOME) == NULL || *home == '\0' || *home == ' ' )
 		home = NULL;
 	}   /* End if */
-	home = unsharp(home);
+	if ( home != NULL )
+	    home = unsharp(home);
     }	/* End if */
 
     while (home && *home == '/' && *(home +1) == '/')	/* remove extra slashes */