Fix possible uninitialized read in fastatof()
Pass levels to fribidi_log2vis()

In logicalToVisualBiDi() in CharsetConverter.cpp the pointer levels
is uninitialized but read from.  It looks like it was intended for
this pointer to passed to fribidi_log2vis() to be populated.
Make sure ifr_name buffer is always NULL-terminated in NetworkLinux.cpp
Fix possible NULL pointer dereferences in CGUIWindowPVR::SetActiveView()
Fix possible NULL pointer dereference in CMusicDatabase::ImportKaraokeInfo()