Hopefull fix compilation of path generation with both IM and GM

heat.cpp

@@ -50,9 +50,14 @@ void Heat::generate_path(std::string filename, const Date_Caches& sorted) {
 	Magick::Image contour(mp->map_file);
 
 	contour.strokeColor("black");
-    contour.strokeWidth(2);
+	contour.strokeWidth(2);
 
+#ifdef graphicsmagick
 	std::list<Magick::Drawable> draw;
+#else
+	std::vector<Magick::Drawable> draw;
+#endif
+
 	const Cache* prev = sorted.begin()->second;
 
 	for (auto el = sorted.begin()++; el != sorted.end(); el++) {