Fix output report length bug & hid read on Windows #28
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On Windows, data shorter than the output report length must be padded.
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On Windows, data shorter than the output report length must be padded to the output report length of the device. This copies data shorter than this length into a temporary buffer. Longer reports behave as before (not sure if it needs to be a multiple of the output report length or what - should be so left it alone).
Also, fix the hid read to never copy in more than was read from the hid device.