(svn r27936) -Fix: When moving wagons in the depot, the drag highlight did not exactly match the length of the dragged wagon chain.

src/train_gui.cpp

@@ -64,14 +64,14 @@ static int HighlightDragPosition(int px, int max_width, VehicleID selection, boo
 	bool rtl = _current_text_dir == TD_RTL;
 
 	assert(selection != INVALID_VEHICLE);
-	int dragged_width = WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
+	int dragged_width = 0;
 	for (Train *t = Train::Get(selection); t != NULL; t = chain ? t->Next() : (t->HasArticulatedPart() ? t->GetNextArticulatedPart() : NULL)) {
 		dragged_width += t->GetDisplayImageWidth(NULL);
 	}
 
-	int drag_hlight_left = rtl ? max(px -dragged_width, 0) : px;
-	int drag_hlight_right = rtl ? px : min(px + dragged_width, max_width);
-	int drag_hlight_width = max(drag_hlight_right - drag_hlight_left, 0);
+	int drag_hlight_left = rtl ? max(px - dragged_width + 1, 0) : px;
+	int drag_hlight_right = rtl ? px : min(px + dragged_width, max_width) - 1;
+	int drag_hlight_width = max(drag_hlight_right - drag_hlight_left + 1, 0);
 
 	if (drag_hlight_width > 0) {
 		GfxFillRect(drag_hlight_left + WD_FRAMERECT_LEFT, WD_FRAMERECT_TOP + 1,