patch from Kristjan Jonsson <kj@raunvis.hi.is> to wxCheckBox::DoGetBestSize()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7277 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/checkbox.cpp

@@ -151,12 +151,12 @@ wxSize wxCheckBox::DoGetBestSize() const
 {
     int wCheckbox, hCheckbox;
 
-    wxString str = wxGetWindowText(GetHWND()) + " ";
+    wxString str = wxGetWindowText(GetHWND());
 
     if ( !str.IsEmpty() )
     {
         GetTextExtent(str, &wCheckbox, &hCheckbox);
-        wCheckbox += CHECK_SIZE;
+        wCheckbox += CHECK_SIZE + GetCharWidth();
 
         if ( hCheckbox < CHECK_SIZE )
             hCheckbox = CHECK_SIZE;