Always reset m_curPage in RemovePage incase the last page has been removed and

the notebook will be empty

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@48925 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/aui/auibook.cpp

@@ -3368,9 +3368,9 @@ bool wxAuiNotebook::RemovePage(size_t page_idx)
     RemoveEmptyTabFrames();
 
     // set new active pane
+    m_curpage = -1;
     if (new_active && !m_isBeingDeleted)
     {
-        m_curpage = -1;
         SetSelection(m_tabs.GetIdxFromWindow(new_active));
     }