code: drawterm

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fix bounds check in screenputc() (thanks mischief)

--- a/kern/term.c

+++ b/kern/term.c

@@ -125,7 +125,7 @@

 	static int *xp;

 	static int xbuf[256];

-	if(xp < xbuf || xp >= &xbuf[sizeof(xbuf)])

+	if(xp < xbuf || xp >= &xbuf[nelem(xbuf)])

 		xp = xbuf;

 	switch(buf[0]) {