gl-renderer: Fix limited range quantization
The highest possible value is 255, not 256, like in previous part of the calculation.
Fix suggested by Pekka Paalanen.
Signed-off-by: Robert Mader robert.mader@collabora.com
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The highest possible value is 255, not 256, like in previous part of the calculation.
Fix suggested by Pekka Paalanen.
Signed-off-by: Robert Mader robert.mader@collabora.com