give TU display a border for definition where applicable

Author: Warboy1982

src/Battlescape/Map.cpp

@@ -1063,14 +1063,21 @@ void Map::drawTerrain(Surface *surface)
 
 						if (_previewSetting & PATH_TU_COST && tile->getTUMarker() > -1)
 						{
-							_numWaypid->setValue(tile->getTUMarker());
-							_numWaypid->draw();
 							int off = tile->getTUMarker() > 9 ? 4 : 2;
-							if (_save->getSelectedUnit() && _save->getSelectedUnit()->getArmor()->getSize() > 1)
+							if (!(_previewSetting & PATH_ARROWS) || _save->getSelectedUnit() && _save->getSelectedUnit()->getArmor()->getSize() > 1)
 							{
-								adjustment += 8;
+								_numWaypid->setBordered(true); // give it a border for the pathfinding display, makes it more visible on snow, etc.
+								off += 1;
+								adjustment += 1;
+								if (_save->getSelectedUnit() && _save->getSelectedUnit()->getArmor()->getSize() > 1)
+								{
+									adjustment += 8;
+								}
 							}
+							_numWaypid->setValue(tile->getTUMarker());
+							_numWaypid->draw();
 							_numWaypid->blitNShade(surface, screenPosition.x + 16 - off, screenPosition.y + (30-adjustment), 0);
+							_numWaypid->setBordered(false); // make sure we remove the border in case it's being used for missile waypoints.
 						}
 					}
 				}