example not building on linux

[rdtor]

/home/s***/of-workspace/addons/ofxAudioAnalyzer/src/ofSoundPlayerExtended.cpp: In member function ‘virtual float ofSoundPlayerExtended::getPosition() const’:
/home/shank/of-workspace/addons/ofxAudioAnalyzer/src/ofSoundPlayerExtended.cpp:726:13: error: control reaches end of non-void function [-Werror=return-type]
pos = float(mpg123_tell(mp3streamf)) / float(channels) / float(samplerate);
~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: some warnings being treated as errors
make[1]: *** [/home/s***/of-workspace/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:354: /home/s***/of-workspace/addons/obj/linux64/Release/ofxAudioAnalyzer/src/ofSoundPlayerExtended.o] Error 1
make[1]: Leaving directory '/home/s***/of-workspace/addons/ofxAudioAnalyzer/example-onsets'
make: *** [/home/s***/of-workspace/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:129: Release] Error 2