#445 .NET runtime checker asserts on PixelConversion

[David Geldreich]

.NET 2003 in debug mode with runtime checking asserts
on some pixel conversions. He thinks we are loosing
data in the convsersion.

This is because the bitmasking is not done correctly.

Adding parenthesis at the right place correct this problem.

I have write a test case to test the 33x33 conversion
possible and only 4 raised this problem.

I attach my patch and the function to test the problem

The compile flag /RTC1 should be set to reproduce the
original problem.

[David Geldreich]

patch against 1.0.5 sources

[David Geldreich]

a function to test all the possible pixel conversions

[Steve Streeting]

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Already applied by nfz