Merge pull request #3297 from Darkyenus/circle-contains

Fix Circle.contains

gdx/src/com/badlogic/gdx/math/Circle.java

@@ -167,10 +167,11 @@ public boolean contains (Vector2 point) {
 	/** @param c the other {@link Circle}
 	 * @return whether this circle contains the other circle. */
 	public boolean contains (Circle c) {
+		final float radiusDiff = radius - c.radius;
+		if (radiusDiff < 0f) return false; // Can't contain bigger circle
 		final float dx = x - c.x;
 		final float dy = y - c.y;
 		final float dst = dx * dx + dy * dy;
-		final float radiusDiff = radius - c.radius;
 		final float radiusSum = radius + c.radius;
 		return (!(radiusDiff * radiusDiff < dst) && (dst < radiusSum * radiusSum));
 	}