Handles empty button-layout value
Handles empty button-layout value

Handles the situation where the value of the key button-layout has been
set to empty string. In this situation the split on : will result in an
array of size 1, which subsequental causes the code to error, as it
assumes there to be at least indexes 0 and 1.

deadalnix/pixel-saver,deadalnix/pixel-saver