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DeviceRequest endian swapping

I'm updating our code to work with gcc4 and want to solve any lingering endian issues.

Since USB is inherently little endian, we swap a lot of things around to big endian and those are easy to take care of with conditional compile macros or the OSSwap routines.

However, I'm wondering about DeviceRequest's parameter block and wValue/wIndex. These values are typically (in the audio spec) compound values with an 8-bit value in the high byte and an 8-bit value in the low byte. Should we be putting these values in the same place on both big endian and little endian machines, or should we put them in a specific order for each endian type?

Thanks,
Mark
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