sh_setmatch(): fix node size calculation

This fixes the function that sets ${.sh.match}. Patch from OpenSUSE:
https://build.opensuse.org/package/view_file/shells/ksh/ksh93-limit-name-len.dif

src/cmd/ksh93/sh/init.c: sh_setmatch():
- Fix node size calculation, possibly preventing data corruption.

src/cmd/ksh93/include/ulimit.h: Limit_t:
- Defining the 'name' struct member as 'char name[16]' makes
  no sense as the name is being initialised statically in
  data/limits.c; just make it a 'char *name' pointer.

src/cmd/ksh93/include/ulimit.h

@@ -157,7 +157,7 @@
 
 typedef struct Limit_s
 {
-	const char	name[16];
+	const char*	name;
 	const char*	description;
 	int		index;
 	const char*	conf;

src/cmd/ksh93/sh/init.c

@@ -161,7 +161,7 @@ struct match
 	char		*val;
 	char		*rval[2];
 	regoff_t	*match;
-	char		node[NV_MINSZ+sizeof(char*)];
+	char		node[NV_MINSZ+sizeof(char*)+sizeof(Dtlink_t)];
 	regoff_t	first;
 	int		vsize;
 	int		nmatch;
@@ -721,7 +721,7 @@ static int hasgetdisc(register Namfun_t *fp)
 void sh_setmatch(Shell_t *shp,const char *v, int vsize, int nmatch, regoff_t match[],int index)
 {
 	struct match	*mp = &ip->SH_MATCH_init;
-	Namval_t	*np = nv_namptr(mp->node,0); 
+	Namval_t	*np = (Namval_t*)(&(mp->node[0]));
 	register int	i,n,x;
 	unsigned int	savesub = shp->subshell;
 	Namarr_t	*ap = nv_arrayptr(SH_MATCHNOD);