[vorbis-dev] fix for oggdrop disappearing window

[Anish Dave]

Hi,

I don't know if this problem has been looked at yet.  The latest version of
oggdrop I found was at
http://www.vorbis.com/files/beta4/windows/oggdrop-1.0beta4.zip.  If you whip
the window quickly from right to left, the client mouse coordinate in
WM_MOUSEMOVE *can* be negative and so the LOWORD and HIWORD macros will cast
the mouse coordinates to insanely high 64K-ish values.  Then the
SetWindowPos moves the window into lala land never to be seen again.  I
don't think windows should ever give you a neg client coordinate, but it
does (maybe it's a win2k thing).

The attached patch just uses LOSHORT and HISHORT macros (signed versions of
the LO/HI WORD macros) instead.  Let me know if it makes sense.

- btw, to reproduce the bug, grab the window and whip around like mad until
it disappears.

Thanks,
Anish Dave
Comp Sci/Soft Eng
Univ of Waterloo (recent grad!)
adave at undergrad.math.uwaterloo.ca


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