code: drawterm

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ref: 7e48e47ab0b00dfe5674b3555a52cace2eb12b98
parent: 550a8ec5f943b87172668581e67128d4770c6e48
author: mischief <mischief@offblast.org>
date: Tue Sep 11 15:34:02 EDT 2018

kern: fix another longjmp bug

declare cnew as volatile, otherwise cclose panics with:
panic: cclose 0x40952a

fixes drawterm -G on freebsd.

--- a/kern/chan.c

+++ b/kern/chan.c

@@ -1162,7 +1162,8 @@

 namec(char *aname, int amode, int omode, ulong perm)

 {

 	int len, n, t, nomount;

-	Chan *c, *cnew;

+	Chan *c;

+	Chan *volatile cnew;

 	Path *path;

 	Elemlist e;

 	Rune r;