open the main game window earlier in the startup procedure.

src/d_main.cpp

@@ -3096,6 +3096,13 @@ static int FileSystemPrintf(FSMessageLevel level, const char* fmt, ...)
 
 static int D_InitGame(const FIWADInfo* iwad_info, std::vector<std::string>& allwads, std::vector<std::string>& pwads)
 {
+	if (!restart)
+	{
+		V_InitScreenSize();
+		// This allocates a dummy framebuffer as a stand-in until V_Init2 is called.
+		V_InitScreen();
+		V_Init2();
+	}
 	SavegameFolder = iwad_info->Autoname;
 	gameinfo.gametype = iwad_info->gametype;
 	gameinfo.flags = iwad_info->flags;
@@ -3255,16 +3262,7 @@ static int D_InitGame(const FIWADInfo* iwad_info, std::vector<std::string>& allw
 	if (!batchrun) Printf ("V_Init: allocate screen.\n");
 	if (!restart)
 	{
-		V_InitScreenSize();
-		// This allocates a dummy framebuffer as a stand-in until V_Init2 is called.
-		V_InitScreen ();
-
-		if (StartScreen != nullptr)
-		{
-			V_Init2();
-			StartScreen->Render();
-		}
-
+		if (StartScreen != nullptr) StartScreen->Render();
 	}
 	else
 	{
@@ -3500,7 +3498,6 @@ static int D_InitGame(const FIWADInfo* iwad_info, std::vector<std::string>& allw
 			return 1337; // special exit
 		}
 
-		if (StartScreen == nullptr) V_Init2();
 		if (StartScreen)
 		{
 			StartScreen->Progress(max_progress);	// advance progress bar to the end.