war on -Werror, part 10: more informals.

src/arch/ArchHooks/ArchHooks.h

@@ -39,7 +39,7 @@ public:
 	 * Optionally, give focus to the existing window. */
 	virtual bool CheckForMultipleInstances(int /* argc */, char* [] /* argv[] */) { return false; }
 
-	virtual void SetTime( tm newtime ) { }
+	virtual void SetTime( tm ) { }
 
 	virtual void BoostPriority() { }
 	virtual void UnBoostPriority() { }

src/arch/LowLevelWindow/LowLevelWindow.h

@@ -25,7 +25,7 @@ public:
 	virtual void GetDisplayResolutions( DisplayResolutions &out ) const = 0;
 
 	virtual void LogDebugInformation() const { }
-	virtual bool IsSoftwareRenderer( RString &sError ) { return false; }
+	virtual bool IsSoftwareRenderer( RString & /* sError */ ) { return false; }
 
 	virtual void SwapBuffers() = 0;
 	virtual void Update() { }

src/arch/MemoryCard/MemoryCardDriver.h

@@ -93,7 +93,7 @@ protected:
 	/* This may be called before GetUSBStorageDevices; return false if the results of
 	 * GetUSBStorageDevices have not changed.  (This is an optimization.) */
 	virtual bool USBStorageDevicesChanged() { return true; }
-	virtual void GetUSBStorageDevices( vector<UsbStorageDevice>& vDevicesOut ) { }
+	virtual void GetUSBStorageDevices( vector<UsbStorageDevice>& /* vDevicesOut */ ) { }
 
 	/* Test the device.  On failure, call pDevice->SetError() appropriately, and return false. */
 	virtual bool TestWrite( UsbStorageDevice* ) { return true; }

src/arch/MovieTexture/MovieTexture.h

@@ -14,13 +14,13 @@ public:
 
 	RageMovieTexture( RageTextureID ID ): RageTexture(ID) { }
 	virtual ~RageMovieTexture() { }
-	virtual void Update( float fDeltaTime ) { }
+	virtual void Update( float /* fDeltaTime */ ) { }
 
 	virtual void Reload() = 0;
 
 	virtual void SetPosition( float fSeconds ) = 0;
 	virtual void SetPlaybackRate( float fRate ) = 0;
-	virtual void SetLooping( bool looping=true ) { }
+	virtual void SetLooping( bool = true ) { }
 
 	bool IsAMovie() const { return true; }
 

src/arch/MovieTexture/MovieTexture_Null.cpp

@@ -12,10 +12,10 @@ public:
 	virtual ~MovieTexture_Null();
 	void Invalidate() { texHandle = 0; }
 	unsigned GetTexHandle() const { return texHandle; }
-	void Update(float delta) { }
+	void Update(float /* delta */) { }
 	void Reload() { }
-	void SetPosition(float seconds) { }
-	void SetPlaybackRate(float rate) { }
+	void SetPosition(float /* seconds */) { }
+	void SetPlaybackRate(float) { }
 	void SetLooping(bool looping=true) { loop = looping; }
 
 private: