attemt to fix shrinking sliders with odd amount of repeats with merged slider rendering

src/itdelatrisu/opsu/objects/curves/Curve.java

@@ -160,11 +160,13 @@ public abstract class Curve {
 	}
 
 	public void reverse() {
-		if (renderState == null)
-			renderState = new CurveRenderState(hitObject, curve);
 		renderState.reverse();
 	}
 
+	public void splice(int from, int to) {
+		renderState.splice(from, to);
+	}
+
 	/**
 	 * Returns the angle of the first control point.
 	 */