[AD] fixes for some al_resize_display cases in Windows

[Dennis-Busch@xxxxxxxxxx]

Patch is attached. Might need some more testing.
I only tested it with the various resize examples in both D3D and
OpenGL displays (Windows 7, single monitor setup).

I could not manage to fix the lost bitmaps problem in OpenGL yet.

Patch notes:
* fixed missing/incorrect resize events under Windows in
 Direct3D and OpenGL displays (could be seen in
 ex_display_events) (this also seems to fix wrong window
 content positioning in OpenGL after resize)

* fixed a case where changing fullscreen mode in D3D via al_resize_display
  caused a crash and loss of loaded bitmaps information causing
  the bitmap not to be converted and thus disappearing after mode change
  (problem could be observed running ex_fs_resize)

* fixed a case where changing fullscreen mode in OpenGL(Windows) via
  al_resize_display cause nothing at all to be rendered after the mode change
  (problem could be observed running ex_fs_resize with an OpenGL display)
  (there is still the problem that bitmaps don't get converted correctly
   -> they seem to end up as fully transparent filled black rectangles
      and so are invisible after the mode change)

Dennis Busch
d_busch@xxxxxxxxxx

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     File:  0001-fixed-missing-incorrect-resize-events-under-Windows.patch
     Date:  12 Jul 2012, 19:48
     Size:  4499 bytes.
     Type:  Unknown

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