don't set items witch are not submitted from UA in content array on callback.

This is usefull if u want to process just subsets of a form e.g. by xajax

etemplate/inc/class.boetemplate.inc.php

@@ -634,11 +634,12 @@
 				{
 					return False;
 				}
+				if(!isset($pos[$idx])) return false;
 				$pos = &$pos[$idx];
 			}
 			return $pos;
 		}
-
+		
 		/**
 		 * unsets $arr[$idx]
 		 *

etemplate/inc/class.uietemplate.inc.php

@@ -1664,7 +1664,7 @@
 			}
 			$GLOBALS['egw_info']['etemplate']['validation_errors'] = array();
 			$this->canceled = $this->button_pressed = False;
-
+			
 			foreach($to_process as $form_name => $type)
 			{
 				if (is_array($type))
@@ -1677,7 +1677,8 @@
 					$attr = array();
 				}
 				$value = $this->get_array($content_in,$form_name,True);
-
+				if($value === false) continue;
+				
 				if (isset($attr['blur']) && $attr['blur'] == $value)
 				{
 					$value = '';	// blur-values is equal to emtpy