Add drop shadow to DrawMapLineSteep

Source/engine/render/automap_render.cpp

@@ -38,12 +38,15 @@ template <DirectionX DirX, DirectionY DirY>
 void DrawMapLineSteep(const Surface &out, Point from, int width, std::uint8_t colorIndex)
 {
 	while (width-- > 0) {
+		out.SetPixel({ from.x, from.y + 1 }, 0);
 		out.SetPixel(from, colorIndex);
 		from.y += static_cast<int>(DirY);
+		out.SetPixel({ from.x, from.y + 1 }, 0);
 		out.SetPixel(from, colorIndex);
 		from.y += static_cast<int>(DirY);
 		from.x += static_cast<int>(DirX);
 	}
+	out.SetPixel({ from.x, from.y + 1 }, 0);
 	out.SetPixel(from, colorIndex);
 }