Fix incorrect maximum number of chunks per packet #3280 #132
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The maximum number of chunks per packet is limited to 255 due to the value being packed into 1 byte in the chunk header. The incorrect limit caused full packets to be packed with the number of chunks value being 0 due to the value 256 overflowing, which would result in receivers not unpacking any chunks due to the number being 0.
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upstream: https://www.github.com/teeworlds/teeworlds/pull/3280