Description:
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The GD function createimagefromwbmp() fails to process some .bmp (with mime type x-ms-bmp).

For developers, this bmp (http://www.licadho-cambodia.org/php/test.bmp) will show the bug.

Any chance of finding a quick fix for this one?

Reproduce code:
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/* download http://www.licadho-cambodia.org/php/test.bmp */
$img = imagecreatefromwbmp(test.bmp')


Expected result:
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The function reads the .bmp and stores the image into $img.

Actual result:
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The function returns a warning (below) and $img is empty.

Warning: imagecreatefromwbmp() [function.imagecreatefromwbmp]: 'test.bmp' is not a valid WBMP file in ...