Cleaning up maths: part 2.

Renamed vector2.

SpaceCadetPinball/TTripwire.h

@@ -7,6 +7,6 @@ class TTripwire :
 public:
 	TTripwire(TPinballTable* table, int groupIndex);
 	~TTripwire() override = default;
-	void Collision(TBall* ball, vector_type* nextPosition, vector_type* direction, float coef,
+	void Collision(TBall* ball, vector2* nextPosition, vector2* direction, float coef,
 	               TEdgeSegment* edge) override;
 };