malloc != calloc: we need the memory to be zeroed when we allocate it.
malloc != calloc: we need the memory to be zeroed when we allocate it.

Fixes the crash that (usually) happened when moving from one track to the next.

This does not need backporting, as it fixes breakage introduced in commit 1010940.

This may fix bug 207500.
CCBUG: 207500


KDE/phonon-waveout,shadeslayer/phonon-gstreamer,KDE/phonon-directshow,KDE/phonon-gstreamer,KDE/phonon-mmf,KDE/phonon-gstreamer,KDE/phonon-directshow,KDE/phonon-xine,KDE/phonon-xine,shadeslayer/phonon-gstreamer,shadeslayer/phonon-gstreamer,KDE/phonon-quicktime,KDE/phonon-xine