Count() is no longer const

mailnews/base/util/nsMsgFolder.cpp

@@ -176,6 +176,13 @@ nsMsgFolder::GetSubFolders(nsIEnumerator* *result)
   return mSubFolders->Enumerate(result);
 }
 
+NS_IMETHODIMP
+nsMsgFolder::GetHasSubFolders(PRBool *_retval)
+{
+  *_retval = (mSubFolders->Count() > 0);
+  return NS_OK;
+}
+
 NS_IMETHODIMP nsMsgFolder::AddFolderListener(nsIFolderListener * listener)
 {
   if (! mListeners)
@@ -289,7 +296,7 @@ NS_IMETHODIMP nsMsgFolder::SetPrettyName(char *name)
   return NS_OK;
 }
 
-NS_IMETHODIMP_(PRUint32) nsMsgFolder::Count(void) const
+NS_IMETHODIMP_(PRUint32) nsMsgFolder::Count(void)
 {
   return mSubFolders->Count();
 }

mailnews/base/util/nsMsgFolder.h

@@ -45,7 +45,7 @@ public:
   NS_DECL_ISUPPORTS_INHERITED
 
   // nsICollection methods:
-  NS_IMETHOD_(PRUint32) Count(void) const;
+  NS_IMETHOD_(PRUint32) Count(void);
   NS_IMETHOD AppendElement(nsISupports *aElement);
   NS_IMETHOD RemoveElement(nsISupports *aElement);
   NS_IMETHOD Enumerate(nsIEnumerator* *result);
@@ -57,6 +57,7 @@ public:
   NS_IMETHOD SetName(char *name);
   NS_IMETHOD GetChildNamed(const char *name, nsISupports* *result);
   NS_IMETHOD GetSubFolders(nsIEnumerator* *result);
+  NS_IMETHOD GetHasSubFolders(PRBool *_retval);
 	NS_IMETHOD AddFolderListener(nsIFolderListener * listener);
 	NS_IMETHOD RemoveFolderListener(nsIFolderListener * listener);
 	NS_IMETHOD GetParent(nsIFolder * *aParent);