typeset: print_value(): save/restore last_table

This fix comes via an OpenSUSE patch but also exists in 93v- beta.
https://build.opensuse.org/package/view_file/shells/ksh/ksh93-typedef.dif
(only the printvalue() diff was still applicable to 93u+m;
the setall() fix was done differently and better in a2f13c1)

src/cmd/ksh93/bltins/typeset.c

@@ -500,6 +500,7 @@ static void print_value(Sfio_t *iop, Namval_t *np, struct tdata *tp)
 {
 	char	 *name;
 	int	aflag=tp->aflag;
+	Namval_t	*table;
 	if(nv_isnull(np))
 	{
 		if(!np->nvflag)
@@ -543,7 +544,9 @@ static void print_value(Sfio_t *iop, Namval_t *np, struct tdata *tp)
 		sfwrite(iop,"}\n",2);
 		return;
 	}
+	table = tp->sh->last_table;
 	sfputr(iop,nv_name(np),aflag=='+'?'\n':'=');
+	tp->sh->last_table = table;
 	if(aflag=='+')
 		return;
 	if(nv_isarray(np) && nv_arrayptr(np))