Need an extra pixel or best size is incorrect when we have a divider (apparent with e.g. wxAUI)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45091 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/tbar95.cpp

@@ -362,6 +362,9 @@ wxSize wxToolBar::DoGetBestSize() const
         sizeBest.y = size.cy;
     }
 
+    if (!IsVertical() && !(GetWindowStyle() & wxTB_NODIVIDER))
+        sizeBest.y += 1;
+
     CacheBestSize(sizeBest);
 
     return sizeBest;