hidpp20: fix Invalid writes
hidpp20: fix Invalid writes

Valgrind complains...

Fixes 19451f9df775e

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

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