user.exe: Avoid using the CONTEXT86 type.

dlls/user.exe16/message.c

@@ -243,7 +243,7 @@ static LRESULT call_window_proc16( HWND16 hwnd, UINT16 msg, WPARAM16 wParam, LPA
 {
     WNDPROC16 func = arg;
     int index = winproc_to_index( func );
-    CONTEXT86 context;
+    CONTEXT context;
     size_t size = 0;
     struct
     {

dlls/user.exe16/user.c

@@ -1809,7 +1809,7 @@ BOOL16 WINAPI SetDeskWallPaper16( LPCSTR filename )
 /***********************************************************************
  *		keybd_event (USER.289)
  */
-void WINAPI keybd_event16( CONTEXT86 *context )
+void WINAPI keybd_event16( CONTEXT *context )
 {
     DWORD dwFlags = 0;
 
@@ -1824,7 +1824,7 @@ void WINAPI keybd_event16( CONTEXT86 *context )
 /***********************************************************************
  *		mouse_event (USER.299)
  */
-void WINAPI mouse_event16( CONTEXT86 *context )
+void WINAPI mouse_event16( CONTEXT *context )
 {
     mouse_event( LOWORD(context->Eax), LOWORD(context->Ebx), LOWORD(context->Ecx),
                  LOWORD(context->Edx), MAKELONG(context->Esi, context->Edi) );