cmtspeech: fine-tune traces printed in error cases
cmtspeech: fine-tune traces printed in error cases

Only print an error-level trace if the libcmtspeechdata interface
is closed during a call.

nemomobile/pulseaudio-module-cmtspeech-n9xx,jusa/pulseaudio-modules-nemo,maemo-foss/maemo-multimedia-pulseaudio-modules-meego,jusa/pulseaudio-modules-nemo,jusa/pulseaudio-modules-nemo,maemo-foss/maemo-multimedia-pulseaudio-modules-meego,nemomobile/pulseaudio-module-cmtspeech-n9xx,maemo-foss/maemo-multimedia-pulseaudio-modules-meego