--- C:/Users/HCL/Downloads/moodle/question/question.php	Thu Apr 18 19:49:40 2013
+++ C:/wamp/www/moodle/question/question.php	Fri May 03 19:33:25 2013
@@ -263,6 +263,20 @@
         question_move_questions_to_category(array($question->id), $tocatid);
 
     } else {
+	    //Before saving the question , we correct the defaultmark if needed
+		//Apply changes eg 0,8 to 0.8
+		str_replace(",",".",$question->defaultmark);
+		
+		//Change the question from text to number
+         	
+        
+		//check that after replacing , by . the defaultmark must be a valid numeric string
+        if(!is_numeric($question->defaultmark))
+        {
+		    // issue warning and stop
+			
+		}		
+		
         // We are acutally saving the question.
         if (!empty($question->id)) {
             question_require_capability_on($question, 'edit');
@@ -273,6 +287,7 @@
             }
         }
         $question = $qtypeobj->save_question($question, $fromform);

         if (!empty($CFG->usetags) && isset($fromform->tags)) {
             // A wizardpage from multipe pages questiontype like calculated may not
             // allow editing the question tags, hence the isset($fromform->tags) test.