FT collision part3: cleanup.

SpaceCadetPinball/maths.h

@@ -53,7 +53,6 @@ struct ray_type
 	float MaxDistance;
 	float MinDistance;
 	float TimeNow;
-	float TimeDelta;
 	int CollisionMask;
 };
 
@@ -115,6 +114,7 @@ public:
 	static float cross(const vector2& vec1, const vector2& vec2);
 	static float magnitude(const vector3& vec);
 	static float magnitudeSq(const vector2& vec);
+	static int magnitudeSq(const vector2i& vec);
 	static void vector_add(vector2& vec1Dst, const vector2& vec2);
 	static vector2 vector_sub(const vector2& vec1, const vector2& vec2);
 	static vector3 vector_sub(const vector3& vec1, const vector3& vec2);