The big NULL replacement party part 5.

Right. ' = NULL' would get a lot of these.

src/RageSoundManager.cpp

@@ -33,9 +33,9 @@
 static RageMutex g_SoundManMutex("SoundMan");
 static Preference<RString> g_sSoundDrivers( "SoundDrivers", "" ); // "" == DEFAULT_SOUND_DRIVER_LIST
 
-RageSoundManager *SOUNDMAN = NULL;
+RageSoundManager *SOUNDMAN = nullptr;
 
-RageSoundManager::RageSoundManager(): m_pDriver(NULL), m_fMixVolume(1.0f),
+RageSoundManager::RageSoundManager(): m_pDriver(nullptr), m_fMixVolume(1.0f),
 	m_fVolumeOfNonCriticalSounds(1.0f) {}
 
 static LocalizedString COULDNT_FIND_SOUND_DRIVER( "RageSoundManager", "Couldn't find a sound driver that works" );