Removed a memory leak in fs_zip.cpp; trivial formatting in helpdata.cpp

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7191 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/window.tex

@@ -1534,6 +1534,11 @@ Note that the size passed is of
 the whole window: call \helpref{wxWindow::GetClientSize}{wxwindowgetclientsize} for the area which may be
 used by the application.
 
+When a window is resized, usually only a small part of the window is damaged and you
+may only need to repaint that area. However, if your drawing depends on the size of the window,
+you may need to clear the DC explicitly and repaint the whole window. In which case, you
+may need to call \helpref{wxWindow::Refresh}{wxwindowrefresh} to invalidate the entire window.
+
 \wxheading{See also}
 
 \helpref{wxSizeEvent}{wxsizeevent},\rtfsp