fix crasher. now that there are no identities associated with

"local folders", we have to plug this hole.

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

@@ -210,8 +210,8 @@ function onDeleteAccount() {
 
 function saveAccount(accountValues, account)
 {
-  var identity;
-  var server;
+  var identity = null;
+  var server = null;
   
   if (account) {
     identity = account.defaultIdentity;

mailnews/base/src/nsMsgAccount.cpp

@@ -266,9 +266,11 @@ nsMsgAccount::GetDefaultIdentity(nsIMsgIdentity * *aDefaultIdentity)
   rv = m_identities->GetElementAt(0, &idsupports);
   if (NS_FAILED(rv)) return rv;
   
-  rv = idsupports->QueryInterface(NS_GET_IID(nsIMsgIdentity),
-                                  (void **)aDefaultIdentity);
-  NS_RELEASE(idsupports);
+  if (idsupports) {
+      rv = idsupports->QueryInterface(NS_GET_IID(nsIMsgIdentity),
+                                          (void **)aDefaultIdentity);
+      NS_RELEASE(idsupports);
+  }
   return rv;
 }