Wrong value written to /proc/stb/power/standbyled

For the ET8000 there is the new feature to turn on/off the blue led in standby.

However the wrong values are written to /proc/stb/power/standbyled. The valid values are on or off, the settings however are writing yes or no

Here is the part: http://sourceforge.net/p/openpli/enigma2/ci/479f2418976a0b3142bda54321cb5d788081565c/tree/lib/python/Components/UsageConfig.py?diff=115181bc62a39a4361da276efb92fb4c4ad46455&diformat=regular