etekcity: make sure action is valid before dereferencing it
etekcity: make sure action is valid before dereferencing it

This should never happen on the Etekcity Scroll Alpha, but we might end
up in a situation where this is required.

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

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