Changing the rolloff settings now immediately apply (with fmodex). Also added AudioLevelUnderwaterRolloff now that the underwater rolloff 3d setting doesnt immediately get clobbered. Also, divvied up sound channels into channelgroups if using the fmod profiler, so it actually has useful info to show now.

indra/llaudio/llaudioengine_fmodex.h

@@ -44,6 +44,7 @@ namespace FMOD
 {
 	class System;
 	class Channel;
+	class ChannelGroup;
 	class Sound;
 	class DSP;
 }
@@ -83,6 +84,9 @@ protected:
 	FMOD::DSP *mWindDSP;
 	FMOD::System *mSystem;
 	bool mEnableProfiler;
+
+public:
+	static FMOD::ChannelGroup *mChannelGroups[LLAudioEngine::AUDIO_TYPE_COUNT];
 };