Fixed bug in dtml manage_edit.

lib/python/OFS/dtml/documentEdit.dtml

@@ -26,7 +26,7 @@ the <em>browse</em> button to select a local file to upload.
 <tr>
   <td align="left" valign="top" colspan="2">
   <dtml-let cols="_.int(REQUEST.get('dtpref_cols',70))"
-            width="_.min(_.int(_.float(dtpref_cols)/70.0 * 100.0),100)">
+            width="_.min(_.int(_.float(cols)/70.0 * 100.0),100)">
   <textarea name="data:text" wrap="off" style="width:&dtml-width;%"
     cols="&dtml-cols;" rows="<dtml-var dtpref_rows missing="20">"
     ><dtml-var __str__></textarea>