Use WNDPROC type for window procedures (#162)

Source/diablo.cpp

@@ -153,7 +153,7 @@ void __fastcall run_game_loop(int uMsg)
 	bool v5; // zf
 	//int v6; // eax
 	signed int v7; // [esp+8h] [ebp-24h]
-	LRESULT (__stdcall *saveProc)(HWND, UINT, WPARAM, LPARAM); // [esp+Ch] [ebp-20h]
+	WNDPROC saveProc; // [esp+Ch] [ebp-20h]
 	struct tagMSG msg; // [esp+10h] [ebp-1Ch]
 
 	nthread_ignore_mutex(1);
@@ -662,16 +662,16 @@ LABEL_10:
 // 646D00: using guessed type char qtextflag;
 // 6AA705: using guessed type char stextflag;
 
-LRESULT __stdcall DisableInputWndProc(HWND hWnd, int uMsg, int wParam, int lParam)
+LRESULT __stdcall DisableInputWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
 	bool v5; // zf
 
-	if ( uMsg <= (unsigned int)WM_LBUTTONDOWN )
+	if ( uMsg <= WM_LBUTTONDOWN )
 	{
 		if ( uMsg != WM_LBUTTONDOWN )
 		{
-			if ( uMsg >= (unsigned int)WM_KEYFIRST
-			  && (uMsg <= (unsigned int)WM_CHAR
+			if ( uMsg >= WM_KEYFIRST
+			  && (uMsg <= WM_CHAR
 			   || uMsg == WM_SYSKEYDOWN
 			   || uMsg == WM_SYSCOMMAND
 			   || uMsg == WM_MOUSEFIRST) )
@@ -724,7 +724,7 @@ LABEL_23:
 }
 // 525748: using guessed type char sgbMouseDown;
 
-int __stdcall GM_Game(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+LRESULT __stdcall GM_Game(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
 	if ( uMsg > WM_LBUTTONDOWN )
 	{

Source/diablo.h

@@ -48,8 +48,8 @@ void __cdecl diablo_init_screen();
 HWND __fastcall diablo_find_window(LPCSTR lpClassName);
 void __fastcall diablo_reload_process(HMODULE hModule);
 int __cdecl PressEscKey();
-LRESULT __stdcall DisableInputWndProc(HWND hWnd, int uMsg, int wParam, int lParam);
-int __stdcall GM_Game(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+LRESULT __stdcall DisableInputWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+LRESULT __stdcall GM_Game(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 bool __fastcall LeftMouseDown(int a1);
 bool __cdecl TryIconCurs();
 void __cdecl LeftMouseUp();

Source/init.cpp

@@ -8,7 +8,7 @@ int window_activated; // weak
 char diablo_exe_path[260];
 void *unused_mpq;
 char patch_rt_mpq_path[260];
-LRESULT (__stdcall *CurrentProc)(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+WNDPROC CurrentProc;
 void *diabdat_mpq;
 char diabdat_mpq_path[260];
 void *patch_rt_mpq;
@@ -515,11 +515,11 @@ LRESULT __stdcall init_redraw_window(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM
 	return result;
 }
 
-LRESULT (__stdcall *SetWindowProc(void *func))(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+WNDPROC __stdcall SetWindowProc(WNDPROC func)
 {
-	LRESULT (__stdcall *result)(HWND, UINT, WPARAM, LPARAM); // eax
+	WNDPROC result; // eax
 
 	result = CurrentProc;
-	CurrentProc = (LRESULT (__stdcall *)(HWND, UINT, WPARAM, LPARAM))func;
+	CurrentProc = func;
 	return result;
 }

Source/init.h

@@ -8,7 +8,7 @@ extern int window_activated; // weak
 extern char diablo_exe_path[260];
 extern void *unused_mpq;
 extern char patch_rt_mpq_path[260];
-extern LRESULT (__stdcall *CurrentProc)(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+extern WNDPROC CurrentProc;
 extern void *diabdat_mpq;
 extern char diabdat_mpq_path[260];
 extern void *patch_rt_mpq;
@@ -32,7 +32,7 @@ void __cdecl init_get_file_info();
 LRESULT __stdcall init_palette(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
 void __fastcall init_activate_window(HWND hWnd, bool activated);
 LRESULT __stdcall init_redraw_window(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
-LRESULT (__stdcall *SetWindowProc(void *func))(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+WNDPROC __stdcall SetWindowProc(WNDPROC func);
 
 /* data */
 extern int init_inf; // weak