cmd/cc: grow some global arrays

Avoids global array buffer overflows if they are
indexed using some of the values between NTYPE
and NALLTYPE.  It is entirely likely that not all of these
are necessary, but this is the C compiler and not worth
worrying much about.  This change takes up only a
few more bytes of memory and makes the behavior
deterministic.

Fixes #3078.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5693052

src/cmd/cc/cc.h

@@ -517,8 +517,8 @@ EXTERN	int	thechar;
 EXTERN	char*	thestring;
 EXTERN	Type*	thisfn;
 EXTERN	int32	thunk;
-EXTERN	Type*	types[NTYPE];
-EXTERN	Type*	fntypes[NTYPE];
+EXTERN	Type*	types[NALLTYPES];
+EXTERN	Type*	fntypes[NALLTYPES];
 EXTERN	Node*	initlist;
 EXTERN	Term	term[NTERM];
 EXTERN	int	nterm;

src/cmd/cc/com64.c

@@ -96,7 +96,7 @@ Node*	nodmmv;
 
 Node*	nodvasop;
 
-char	etconv[NTYPE];	/* for _vasop */
+char	etconv[NALLTYPES];	/* for _vasop */
 Init	initetconv[] =
 {
 	TCHAR,		1,	0,

src/cmd/cc/funct.c

@@ -46,7 +46,7 @@ struct	Gtab
 };
 
 Ftab	ftabinit[OEND];
-Gtab	gtabinit[NTYPE];
+Gtab	gtabinit[NALLTYPES];
 
 int
 isfunct(Node *n)
@@ -350,7 +350,7 @@ bad:
 	diag(Z, "dclfunct bad %T %s\n", t, s->name);
 }
 
-Gtab	gtabinit[NTYPE] =
+Gtab	gtabinit[NALLTYPES] =
 {
 	TCHAR,		"c",
 	TUCHAR,		"uc",

src/cmd/cc/sub.c

@@ -1538,92 +1538,92 @@ uchar	logrel[12] =
 	OEQ, ONE, OLS, OLS, OLO, OLO, OHS, OHS, OHI, OHI,
 };
 
-uchar	typei[NTYPE];
+uchar	typei[NALLTYPES];
 int	typeiinit[] =
 {
 	TCHAR, TUCHAR, TSHORT, TUSHORT, TINT, TUINT, TLONG, TULONG, TVLONG, TUVLONG, -1,
 };
-uchar	typeu[NTYPE];
+uchar	typeu[NALLTYPES];
 int	typeuinit[] =
 {
 	TUCHAR, TUSHORT, TUINT, TULONG, TUVLONG, TIND, -1,
 };
 
-uchar	typesuv[NTYPE];
+uchar	typesuv[NALLTYPES];
 int	typesuvinit[] =
 {
 	TVLONG, TUVLONG, TSTRUCT, TUNION, -1,
 };
 
-uchar	typeilp[NTYPE];
+uchar	typeilp[NALLTYPES];
 int	typeilpinit[] =
 {
 	TINT, TUINT, TLONG, TULONG, TIND, -1
 };
 
-uchar	typechl[NTYPE];
-uchar	typechlv[NTYPE];
-uchar	typechlvp[NTYPE];
+uchar	typechl[NALLTYPES];
+uchar	typechlv[NALLTYPES];
+uchar	typechlvp[NALLTYPES];
 int	typechlinit[] =
 {
 	TCHAR, TUCHAR, TSHORT, TUSHORT, TINT, TUINT, TLONG, TULONG, -1,
 };
 
-uchar	typechlp[NTYPE];
+uchar	typechlp[NALLTYPES];
 int	typechlpinit[] =
 {
 	TCHAR, TUCHAR, TSHORT, TUSHORT, TINT, TUINT, TLONG, TULONG, TIND, -1,
 };
 
-uchar	typechlpfd[NTYPE];
+uchar	typechlpfd[NALLTYPES];
 int	typechlpfdinit[] =
 {
 	TCHAR, TUCHAR, TSHORT, TUSHORT, TINT, TUINT, TLONG, TULONG, TFLOAT, TDOUBLE, TIND, -1,
 };
 
-uchar	typec[NTYPE];
+uchar	typec[NALLTYPES];
 int	typecinit[] =
 {
 	TCHAR, TUCHAR, -1
 };
 
-uchar	typeh[NTYPE];
+uchar	typeh[NALLTYPES];
 int	typehinit[] =
 {
 	TSHORT, TUSHORT, -1,
 };
 
-uchar	typeil[NTYPE];
+uchar	typeil[NALLTYPES];
 int	typeilinit[] =
 {
 	TINT, TUINT, TLONG, TULONG, -1,
 };
 
-uchar	typev[NTYPE];
+uchar	typev[NALLTYPES];
 int	typevinit[] =
 {
 	TVLONG,	TUVLONG, -1,
 };
 
-uchar	typefd[NTYPE];
+uchar	typefd[NALLTYPES];
 int	typefdinit[] =
 {
 	TFLOAT, TDOUBLE, -1,
 };
 
-uchar	typeaf[NTYPE];
+uchar	typeaf[NALLTYPES];
 int	typeafinit[] =
 {
 	TFUNC, TARRAY, -1,
 };
 
-uchar	typesu[NTYPE];
+uchar	typesu[NALLTYPES];
 int	typesuinit[] =
 {
 	TSTRUCT, TUNION, -1,
 };
 
-int32	tasign[NTYPE];
+int32	tasign[NALLTYPES];
 Init	tasigninit[] =
 {
 	TCHAR,		BNUMBER,	0,
@@ -1644,7 +1644,7 @@ Init	tasigninit[] =
 	-1,		0,		0,
 };
 
-int32	tasadd[NTYPE];
+int32	tasadd[NALLTYPES];
 Init	tasaddinit[] =
 {
 	TCHAR,		BNUMBER,	0,
@@ -1663,7 +1663,7 @@ Init	tasaddinit[] =
 	-1,		0,		0,
 };
 
-int32	tcast[NTYPE];
+int32	tcast[NALLTYPES];
 Init	tcastinit[] =
 {
 	TCHAR,		BNUMBER|BIND|BVOID,	0,
@@ -1685,7 +1685,7 @@ Init	tcastinit[] =
 	-1,		0,			0,
 };
 
-int32	tadd[NTYPE];
+int32	tadd[NALLTYPES];
 Init	taddinit[] =
 {
 	TCHAR,		BNUMBER|BIND,	0,
@@ -1704,7 +1704,7 @@ Init	taddinit[] =
 	-1,		0,		0,
 };
 
-int32	tsub[NTYPE];
+int32	tsub[NALLTYPES];
 Init	tsubinit[] =
 {
 	TCHAR,		BNUMBER,	0,
@@ -1723,7 +1723,7 @@ Init	tsubinit[] =
 	-1,		0,		0,
 };
 
-int32	tmul[NTYPE];
+int32	tmul[NALLTYPES];
 Init	tmulinit[] =
 {
 	TCHAR,		BNUMBER,	0,
@@ -1741,7 +1741,7 @@ Init	tmulinit[] =
 	-1,		0,		0,
 };
 
-int32	tand[NTYPE];
+int32	tand[NALLTYPES];
 Init	tandinit[] =
 {
 	TCHAR,		BINTEGER,	0,
@@ -1757,7 +1757,7 @@ Init	tandinit[] =
 	-1,		0,		0,
 };
 
-int32	trel[NTYPE];
+int32	trel[NALLTYPES];
 Init	trelinit[] =
 {
 	TCHAR,		BNUMBER,	0,