Fix typo in comment.

toolkit/content/nsDragAndDrop.js

@@ -316,7 +316,7 @@ var transferUtils = {
  * Use: map the handler functions to the 'ondraggesture', 'ondragover' and
  *   'ondragdrop' event handlers on your XML element, e.g.                   
  *   <xmlelement ondraggesture="nsDragAndDrop.startDrag(event, observer);"   
- *               ondragover="nsDragAndDrop.startDrag(event, observer);"      
+ *               ondragover="nsDragAndDrop.dragOver(event, observer);"      
  *               ondragdrop="nsDragAndDrop.drop(event, observer);"/>         
  *                                                                           
  *   You need to create an observer js object with the following member      

xpfe/global/resources/content/nsDragAndDrop.js

@@ -58,7 +58,7 @@
  * Use: map the handler functions to the 'ondraggesture', 'ondragover' and
  *   'ondragdrop' event handlers on your XML element, e.g.                   
  *   <xmlelement ondraggesture="nsDragAndDrop.startDrag(event, observer);"   
- *               ondragover="nsDragAndDrop.startDrag(event, observer);"      
+ *               ondragover="nsDragAndDrop.dragOver(event, observer);"      
  *               ondragdrop="nsDragAndDrop.drop(event, observer);"/>         
  *                                                                           
  *   You need to create an observer js object with the following member