fixed test runtime issue

src/test/java/it/unibz/inf/isochrone/network/RuntimeComplex.java

@@ -156,8 +156,8 @@ public final class RuntimeComplex {
 		final Set<Integer> times = new TreeSet<Integer>();
 		for (int offset : RUNTIME_OFFSETS) {
 			int stepWidth = (offset / RUNTIME_POINTS_PER_OFFSET);
-			for (int i = stepWidth; i < offset; i += stepWidth) {
-				int runtime = Math.max(offset, offset * i);
+			for (int i = 1; i < offset; i += stepWidth) {
+				int runtime = offset * i;
 				if (runtime > MAX_RUNTIME) {
 					return times;
 				}