File ksh93-typedef.dif of Package ksh

--- src/cmd/ksh93/bltins/typeset.c
+++ src/cmd/ksh93/bltins/typeset.c	2013-03-19 17:21:08.667413362 +0100
@@ -461,6 +461,7 @@ static void print_value(Sfio_t *iop, Nam
 {
 	char	 *name;
 	int	aflag=tp->aflag;
+	Namval_t	*table;
 	if(nv_isnull(np))
 	{
 		if(!np->nvflag)
@@ -504,7 +505,9 @@ static void print_value(Sfio_t *iop, Nam
 		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))
@@ -538,7 +541,7 @@ static int     setall(char **argv,regist
 	}
 	else if(*shp->prefix==0)
 		shp->prefix = 0;
-	if(*argv[0]=='+')
+	if(*argv && *argv[0]=='+')
 		nvflags |= NV_NOADD;
 	flag &= ~(NV_NOARRAY|NV_NOSCOPE|NV_VARNAME|NV_IDENT|NV_STATIC|NV_COMVAR|NV_IARRAY);
 	if(argv[1])
@@ -675,6 +678,7 @@ static int     setall(char **argv,regist
 			{
 				if(comvar || (shp->last_root==shp->var_tree && (tp->tp || (!shp->st.real_fun && (nvflags&NV_STATIC)) || (!(flag&(NV_EXPORT|NV_RDONLY)) && nv_isattr(np,(NV_EXPORT|NV_IMPORT))==(NV_EXPORT|NV_IMPORT)))))
 {
+				if((flag&(NV_HOST|NV_INTEGER))!=NV_HOST)
 					_nv_unset(np,0);
 }
 			}
@@ -790,7 +794,7 @@ static int     setall(char **argv,regist
 				else
 				{
 					char *oldname=0;
-					int len=strlen(name);
+					size_t len=strlen(name);
 					if(tp->argnum==1 && newflag==NV_INTEGER && nv_isattr(np,NV_INTEGER))
 						tp->argnum = 10;
 					if(np->nvfun && !nv_isarray(np) && name[len-1]=='.')