cc: fix an out of bounds array access
cc: fix an out of bounds array access

Alternatively, we could expand the ewidth array
in [568]c/txt.c to have NALLTYPES elements and
give all types above NTYPE a width of -1.

I don't think it's worth it since TDOT and TOLD
are the only two type values above NTYPE that
are passed to typ:

$ /tmp/cctypes
cc/dcl.c:683: 			t->down = typ(TOLD, T);
cc/dcl.c:919: 		return typ(TDOT, T);
$

Fixes issue 3063.

R=golang-dev, rsc
CC=golang-dev
http://codereview.appspot.com/5694047

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

apparentlymart/golang,gnanderson/go,tv42/old-go,apparentlymart/golang,dsriram/golang,gnanderson/go,dsriram/golang,pombredanne/go-deleteme,tv42/old-go,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,dsriram/golang,tv42/old-go,tv42/old-go,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,apparentlymart/golang,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,tv42/old-go,apparentlymart/golang,gnanderson/go,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,tv42/old-go