Decompile 018_StartUp overlay (#19)

* Decompile StartUp overlay (99%)

* jp delinks

* regression fix

include/Game/GameModeManager.hpp

@@ -15,9 +15,12 @@ class GameModeManagerBase_104_04 {
 public:
     /* 00 */ void *mUnk_00;
     /* 04 */ void *mUnk_04;
+    /* 08 */
 
     void func_020166ac(void);
     void func_020166cc(void *param1);
+
+    GameModeManagerBase_104_04();
 };
 
 class GameModeManagerBase_104_0C_04 {

include/Game/GameModeStartUp.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "Game/GameMode.hpp"
+#include "Unknown/UnkStruct_0204a060.hpp"
+#include "global.h"
+#include "types.h"
+
+class GameModeStartUp : public GameModeBase {
+public:
+    /* 00 (base) */
+    /* 04 */ UnkStruct_0204a060_Base mUnk_04;
+    /* 28 */ u16 mUnk_28;
+    /* 2A */ bool mUnk_2A;
+    /* 2B */ unk8 mUnk_2B;
+    /* 2C */ unk32 mUnk_2C;
+    /* 30 */ unk32 mUnk_30;
+    /* 34 */
+
+    GameModeStartUp();
+
+    // data_ov018_020c5b28 vtable
+    /* 00 */ virtual ~GameModeStartUp() override {}
+    /* 0C */ virtual void vfunc_0C() override;
+    /* 20 */ virtual void vfunc_20() override;
+
+    // gets rid of the operator delete call in D0
+    void operator delete(void *ptr) {}
+};
+
+extern void func_ov018_020c4b08(unk16 *param1);
+extern void func_ov018_020c4e8c(void);