Fixing bug 138462. Patch in here fixes the crash and hang states reported when user clicked on mailto: link and then try to cancel out of the mailnews account wizard, with a new profile. Patch is contributed by Andrew Shultz (ajschultz@eos.nscu.edu). r=bhuvan, sr=bzbarsky

mailnews/base/prefs/resources/content/AccountWizard.js

@@ -166,7 +166,7 @@ function onCancel()
         closeWizard = false;
     }
 
-    if(top.okCallback) {
+    if(top.okCallback && closeWizard) {
       var state = false;
       top.okCallback(state);
     }