(svn r22654) [1.1] -Backport from trunk:

- Fix: Switching from a red to a white highlight (by switching to another tool) without switching the highlight mode (HT_RECT etc.) did not mark the selection dirty [FS#4670] (r22649)
- Fix: [NewGRF] Parameters from NewGRFs were not properly parsed in all cases [FS#4599] (r22648, r22630, r22629, r22628, r22627)
- Fix: GetSection() does not return a LockPart [FS#4678] (r22645)
- Fix: [NewGRF] Disallow building NewObjects on water tiles owned by another company (r22643)

src/viewport.cpp

@@ -2859,6 +2859,9 @@ void SetObjectToPlace(CursorID icon, PaletteID pal, HighLightStyle mode, WindowC
 		if (w != NULL) w->OnPlaceObjectAbort();
 	}
 
+	/* Mark the old selection dirty, in case the selection shape or colour changes */
+	if ((_thd.drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
+
 	SetTileSelectSize(1, 1);
 
 	_thd.make_square_red = false;