Fix Cppcheck issue. QPoint is default initialised to 0,0 so it's not necessary to do it explicitly.
Fix Coverity 700396. Unchecked dynamic cast. Swap for a static_cast since it would appear that we are certain about the type.
DVBChannel: Fix Coverity 700907. Uninitialized integer fields.
MHEngine: Fix Coverity 700723. Replace a static cast with a dynamic cast since we can't be sure that ParseProgram() will return an MHApplication pointer instead of an MHScene.
Disable MythSystem backgrounding test; it has identified an active null pointer dereference
Move libmythsamplerate to external/libsamplerate.
Don't install libmythdvdnav and libmythbluray libs. They are statically linked so don't need to be installed.
VideoVisualGoom: Fix GCC warning about implicit conversion from int to uint.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	mythtv/configure
	mythtv/external/Makefile