name sound mutexes differently

stepmania/src/RageSound.cpp

@@ -190,6 +190,8 @@ bool RageSound::Load(CString sSoundFilePath, int precache)
 		}
 	}
 
+	m_Mutex.SetName( ssprintf("RageSound (%s)", Basename(sSoundFilePath).c_str() ) );
+
 	return true;
 }
 

stepmania/src/RageThreads.h

@@ -51,7 +51,7 @@ class RageMutex
 	friend struct RageMutexImpl;
 
 	RageMutexImpl *mut;
-	const CString m_sName;
+	CString m_sName;
 
 	int m_UniqueID;
 	
@@ -59,6 +59,7 @@ class RageMutex
 
 public:
 	CString GetName() const { return m_sName; }
+	void SetName( const CString &s ) { m_sName = s; }
 	void Lock();
 	void Unlock();
 	bool IsLockedByThisThread() const;