Windows: Do not deselect GL context when losing focus (#1208).

Fixes engine intialization when tabbing out.

src/graphics/C4DrawGL.cpp

@@ -690,13 +690,6 @@ bool CStdGL::CheckGLError(const char *szAtOp)
 
 CStdGL *pGL=NULL;
 
-#ifdef USE_WIN32_WINDOWS
-void CStdGL::TaskOut()
-{
-	if (pCurrCtx) pCurrCtx->Deselect();
-}
-#endif
-
 bool CStdGL::OnResolutionChanged(unsigned int iXRes, unsigned int iYRes)
 {
 	// Re-create primary clipper to adapt to new size.

src/graphics/C4DrawGL.h

@@ -169,7 +169,6 @@ public:
 	virtual CStdGLCtx *CreateContext(C4Window * pWindow, C4AbstractApp *pApp);
 #ifdef USE_WIN32_WINDOWS
 	virtual CStdGLCtx *CreateContext(HWND hWindow, C4AbstractApp *pApp);
-	void TaskOut();
 #endif
 	// Blit
 	void SetupMultiBlt(C4ShaderCall& call, const C4BltTransform* pTransform, GLuint baseTex, GLuint overlayTex, GLuint normalTex, DWORD dwOverlayModClr);

src/platform/C4WindowWin32.cpp

@@ -118,8 +118,6 @@ LRESULT APIENTRY FullScreenWinProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM l
 			{
 				if (pTexMgr)
 					pTexMgr->IntLock();
-				if (pGL)
-					pGL->TaskOut();
 				if (Application.FullScreenMode())
 				{
 					::ChangeDisplaySettings(NULL, 0);