Make collision code placement more like original (+ small fixes)

src/collision/ColBox.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "SurfaceTable.h"
+
+struct CColBox
+{
+	CVector min;
+	CVector max;
+	uint8 surface;
+	uint8 piece;
+
+	void Set(const CVector &min, const CVector &max, uint8 surf = SURFACE_DEFAULT, uint8 piece = 0);
+	CVector GetSize(void) { return max - min; }
+
+	CColBox& operator=(const CColBox &other);
+};