MythMusic: remove some redundant code from CdDecoder
Potentially fix segfaults on frontend startup

In nvctrl-util's GetNvidiaRates():
Initialise buf values to NULL, reduce it's size from 256 to 8 since
we're only interested in the first 8 tokens and actually check that we
parsed all 8 from the string before proceeding to use them.

While here change logging from VB_PLAYBACK to VB_GUI which makes more sense.

This may fix some frontend startup segfaults experienced by some
people since we ended up using an area of uninitialised memory in
strtol.

Coverity 746855
Add a constructor to ArbitraryLocatedData to initialise members

Coverity 746854
Pull in fix for out-of-bounds array write in xine_demux_sputext.cpp from upstream. Coverity 746831
Merge remote-tracking branch 'upstream/master'
Check the return value of query.exec in dbutil.cpp

Fixes coverity 703634