Fix a couple of bugs wrt how netbuild communicates with the beginexp

page.

www/beginexp_form.php3

@@ -189,7 +189,7 @@ function SPITFORM($formfields, $errors)
 	echo "</table><br>\n";
     }
     else {
-	if (!isset($nsref) && !isset($view['quiet'])) {
+	if (!isset($formfields[nsref]) && !isset($view['quiet'])) {
 	  echo "<p><ul>
 	    <li><b>If you have an NS file:</b><br> You may want to
                 <b><a href='nscheck_form.php3'>syntax check it first</a></b>

www/beginexp_xml.php3

@@ -148,14 +148,14 @@ elseif (!TBvalid_description($formfields[exp_description])) {
 #
 if (isset($formfields[nsref])) {
     if ($formfields[nsref] == "" ||
-	!ereg("^[0-9]+$", $formfields[nsref] == "")) {
-	$errors["NS File Reference"] = TBFieldErrorString();
+	!preg_match("/^\d+$/", $formfields[nsref])) {
+	$errors["NS File Reference"] = "Invalid characters";
     }
 }
 if (isset($formfields[guid])) {
     if ($formfields[guid] == "" ||
-	!ereg("^[0-9]+$", $formfields[guid] == "")) {
-	$errors["NS File UID"] = TBFieldErrorString();
+	!preg_match("/^\d+$/", $formfields[guid])) {
+	$errors["NS File GUID"] = "Invalid characters";
     }
     $nsfilelocale = "nsref";
 }