user32: Remove unused argument for unpack_message.

dlls/user32/hook.c

@@ -478,7 +478,7 @@ BOOL WINAPI User32CallWindowsHook( struct win_hook_params *params, ULONG size )
             {
                 cbtc.hwndInsertAfter = HWND_TOP;
                 unpack_message( (HWND)params->wparam, WM_CREATE, NULL, (LPARAM *)&cbtc.lpcs,
-                                ret_ptr, ret_size, FALSE );
+                                ret_ptr, FALSE );
                 params->lparam = (LPARAM)&cbtc;
                 ret_size = sizeof(*cbtc.lpcs);
             }
@@ -490,7 +490,7 @@ BOOL WINAPI User32CallWindowsHook( struct win_hook_params *params, ULONG size )
                 size_t offset = (lparam_offset + sizeof(*cwp) + 15) & ~15;
 
                 unpack_message( cwp->hwnd, cwp->message, &cwp->wParam, &cwp->lParam,
-                                (char *)params + offset, size - offset, !params->prev_unicode );
+                                (char *)params + offset, !params->prev_unicode );
                 ret_size = 0;
                 break;
             }
@@ -501,7 +501,7 @@ BOOL WINAPI User32CallWindowsHook( struct win_hook_params *params, ULONG size )
                 size_t offset = (lparam_offset + sizeof(*cwpret) + 15) & ~15;
 
                 unpack_message( cwpret->hwnd, cwpret->message, &cwpret->wParam, &cwpret->lParam,
-                                (char *)params + offset, size - offset, !params->prev_unicode );
+                                (char *)params + offset, !params->prev_unicode );
                 ret_size = 0;
                 break;
             }

dlls/user32/user_private.h

@@ -52,7 +52,7 @@ extern BOOL unpack_dde_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM
 extern void free_cached_data( UINT format, HANDLE handle );
 extern HANDLE render_synthesized_format( UINT format, UINT from );
 extern void unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lparam,
-                            void *buffer, size_t size, BOOL ansi );
+                            void *buffer, BOOL ansi );
 
 extern void CLIPBOARD_ReleaseOwner( HWND hwnd );
 extern HDC get_display_dc(void);

dlls/user32/winproc.c

@@ -738,8 +738,7 @@ static size_t string_size( const void *str, BOOL ansi )
  *
  * Unpack a message received from win32u.
  */
-void unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lparam,
-                     void *buffer, size_t size, BOOL ansi )
+void unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lparam, void *buffer, BOOL ansi )
 {
     switch(message)
     {
@@ -816,7 +815,7 @@ BOOL WINAPI User32CallWindowProc( struct win_proc_params *params, ULONG size )
         buffer = (char *)params + offset;
 
         unpack_message( params->hwnd, params->msg, &params->wparam, &params->lparam,
-                        buffer, packed_size, params->ansi );
+                        buffer, params->ansi );
     }
 
     result = dispatch_win_proc_params( params );