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libdraw: fix memory corruption bug in initdisplay()

--- a/sys/src/libdraw/init.c

+++ b/sys/src/libdraw/init.c

@@ -253,7 +253,7 @@

 	}

 	if(n==NINFO+1)

 		n = NINFO;

-	buf[n] = '\0';

+	info[n] = '\0';

 	isnew = 0;

 	if(n < NINFO)	/* this will do for now, we need something better here */

 		isnew = 1;

-- 

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