merge dupe EndFrame code

stepmania/src/RageDisplay.cpp

@@ -106,6 +106,11 @@ CString RageDisplay::GetStats() const
 	return ssprintf( "%i FPS\n%i av FPS\n%i VPF", GetFPS(), GetCumFPS(), GetVPF() );
 }
 
+void RageDisplay::EndFrame()
+{
+	ProcessStatsOnFlip();
+}
+
 void RageDisplay::StatsAddVerts( int iNumVertsRendered ) { g_iVertsRenderedSinceLastCheck += iNumVertsRendered; }
 
 /* Draw a line as a quad.  GL_LINES with SmoothLines off can draw line

stepmania/src/RageDisplay.h

@@ -134,7 +134,7 @@ public:
 	virtual void ResolutionChanged() { }
 
 	virtual bool BeginFrame() = 0;	
-	virtual void EndFrame() = 0;
+	virtual void EndFrame();
 	virtual VideoModeParams GetVideoModeParams() const = 0;
 	bool IsWindowed() const { return this->GetVideoModeParams().windowed; }
 	

stepmania/src/RageDisplay_D3D.cpp

@@ -644,9 +644,10 @@ void RageDisplay_D3D::EndFrame()
 {
 	g_pd3dDevice->EndScene();
 	g_pd3dDevice->Present( 0, 0, 0, 0 );
-	ProcessStatsOnFlip();
 
 	GraphicsWindow::Update();
+
+	RageDisplay::EndFrame();
 }
 
 bool RageDisplay_D3D::SupportsTextureFormat( PixelFormat pixfmt, bool realtime )

stepmania/src/RageDisplay_OGL.cpp

@@ -734,7 +734,6 @@ void RageDisplay_OGL::EndFrame()
 	glFlush();
 
 	wind->SwapBuffers();
-	ProcessStatsOnFlip();
 
 	wind->Update();
 
@@ -771,6 +770,8 @@ void RageDisplay_OGL::EndFrame()
 		XUnlockDisplay( g_X11Display );
 #endif
 	}
+
+	RageDisplay::EndFrame();
 }
 
 RageSurface* RageDisplay_OGL::CreateScreenshot()