Removed debug code.
Fixed some warnings printed when sfx are disabled.
Try to fix travis build.
Revert "Try to fix travis build."

This reverts commit 3ea954cc73eceb58d558c1e62ecb70267e8491eb.
Try to fix travis build.
Try to fix model loader hpp
Only restart sfx if they were really paused.
Merge branch 'master' of github.com:supertuxkart/stk-code
Fixed #1147 - sounds should stopped when they are disabled in option screen.
Fixed by explicitely stopping all non-looped sfx.
Fix potential memory overwrite in soccer mode when using one player
only (artist debug mode).
Fixed sound objects.
Handle setMasterVolume in sfx thread.
Make sure the sfx are resumed before calling onSOundEnbaledBack().
only one saved GP per GP-ident

Conflicts:
	src/graphics/glwrap.cpp
fix ordering of the karts and maybe some more
Save GP reverse Type; close #1137
Save GP on abort
Remove saved GP when we start new race.

Avoid a crash. Saved GP was deleted, but was not NULL. And in other place we have if(m_saved_gp != NULL) check, which was true for deleted object.
Redrawing GP info screen is not needed now.
Renamed SoundToggled to toggleSound.