hidpp20drv: fix segfault when a device is not powered on
hidpp20drv: fix segfault when a device is not powered on

We were returning 0 and libratbag tried to access the profiles afterward.

Signed-off-by: Benjamin Tissoires <7a0e50e3f6a0939db82b6a8a423c08a163896f41@gmail.com>

libratbag/libratbag,cvuchener/libratbag,whot/libratbag,whot/libratbag,cvuchener/libratbag,libratbag/libratbag,cvuchener/libratbag,libratbag/libratbag,whot/libratbag