making bool of AlertCheck be a inout param. this was suggested by morse@netscape.com

xpfe/appshell/public/nsICommonDialogs.idl

@@ -50,8 +50,8 @@ enum { eButtonPressed = 0, eCheckboxState = 1, eNumberButtons = 2, eNumberEditfi
      * a message with a single checkbox.
      * @return the value of the checkbox.
      */
-    boolean AlertCheck(in nsIDOMWindow inParent, in wstring inDialogTitle, in wstring inMsg,
-                         in wstring inCheckMsg);
+    void AlertCheck(in nsIDOMWindow inParent, in wstring inDialogTitle, in wstring inMsg,
+                         in wstring inCheckMsg, inout boolean outCheckValue);
 
     /**
      * Puts up a dialog with OK and Cancel buttons.