Fix slowdown when loading games

src/Misc/Bugfixes.cpp

@@ -20,6 +20,7 @@
 #include <Utilities/Macro.h>
 #include <SessionClass.h>
 #include <Unsorted.h>
+#include <WWMouseClass.h>
 
 // skip error "А mouse is required for playing Yurts Revenge" - remove the GetSystemMetrics check
 DEFINE_JUMP(LJMP, 0x6BD8A4, 0x6BD8C2); // WinMain
@@ -51,3 +52,16 @@ DEFINE_HOOK(0x55E08F, KeyboardProcess_PressTab, 0x5)
 
 	return 0x55E099;
 }
+
+// Do_Blit's 50ms wait guards the cursor restore after the primary-surface blit, but that restore
+// (0x7B92D0) and the draw before it (0x7B90C0) are both no-ops unless IsCaptured(). Loading screens
+// pass mouse_captured = true while the mouse is uncaptured, so vanilla sleeps 40+ times per scenario
+// load guarding nothing - about two seconds. When captured, this is the vanilla path unchanged.
+DEFINE_HOOK(0x4F4B8E, GScreenClass_DoBlit_SkipUncapturedCursorWait, 0x8)
+{
+	// Do_Blit already tested WWMouse for null at 0x4F4B8A.
+	if (WWMouseClass::Instance->IsCaptured())
+		Sleep(50);
+
+	return 0x4F4B96;
+}