Andrew Short a30ea8e92c Fix overflow in STL header colour reading. ...

When reading the STL header for a "COLOR=rgb" part, the bytes were treated as signed chars, when in fact they can range from 0-255. This meant that any value greater than 127 would overflow, leading to an incorrect colour.

This change fixes the issue by treating the header as unsigned chars.

2014-07-13 00:34:08 +10:00

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