fix for cygwin warnings (modified patch 622146)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17511 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/combobox.cpp

@@ -135,7 +135,7 @@ LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd,
                 wxCHECK_MSG( win, 0, _T("should have a parent") );
 
                 NMHDR* hdr = (NMHDR *)lParam;
-                if ( (int)hdr->code == TTN_NEEDTEXT )
+                if ( hdr->code == TTN_NEEDTEXT )
                 {
                     wxToolTip *tooltip = win->GetToolTip();
                     if ( tooltip )

src/msw/radiobox.cpp

@@ -884,7 +884,7 @@ LRESULT APIENTRY _EXPORT wxRadioBtnWndProc(HWND hwnd,
         case WM_NOTIFY:
             {
                 NMHDR* hdr = (NMHDR *)lParam;
-                if ( (int)hdr->code == TTN_NEEDTEXT )
+                if ( hdr->code == TTN_NEEDTEXT )
                 {
                     wxRadioBox *radiobox = (wxRadioBox *)
                         ::GetWindowLong(hwnd, GWL_USERDATA);

src/msw/treectrl.cpp

@@ -2302,8 +2302,8 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                         break;
                 }
 
-                int how = (int)hdr->code == TVN_ITEMEXPANDING ? IDX_DOING
-                                                              : IDX_DONE;
+                int how = hdr->code == TVN_ITEMEXPANDING ? IDX_DOING
+                                                         : IDX_DONE;
 
                 eventType = gs_expandEvents[what][how];