winex11: Fix event coordinates mapping for the root window in the explorer process.

dlls/winex11.drv/event.c

@@ -788,6 +788,7 @@ static void X11DRV_Expose( HWND hwnd, XEvent *xev )
 
         flags |= RDW_ALLCHILDREN;
     }
+    else OffsetRect( &rect, virtual_screen_rect.left, virtual_screen_rect.top );
 
     RedrawWindow( hwnd, &rect, 0, flags );
 }

dlls/winex11.drv/mouse.c

@@ -239,6 +239,11 @@ static HWND update_mouse_state( HWND hwnd, Window window, int x, int y, unsigned
         x += data->whole_rect.left - data->client_rect.left;
         y += data->whole_rect.top - data->client_rect.top;
     }
+    if (window == root_window)
+    {
+        x += virtual_screen_rect.left;
+        y += virtual_screen_rect.top;
+    }
     pt->x = x;
     pt->y = y;
     if (GetWindowLongW( data->hwnd, GWL_EXSTYLE ) & WS_EX_LAYOUTRTL)