[MathLib] Constructor of TemplateVector3 needs a initializer list.

The TemplateVector3 is derived from TemplatePoint<T,N>. There isn't a
constructor taking 3 values for TemplatePoint. Instead of this a std::array
is used to initialize the TemplatePoint data structures. For this reason
the TemplateVector3 constructor that is taking two points to initialize
the internal data needs an initializer list.

MathLib/Vector3.h

@@ -43,7 +43,7 @@ public:
 	{}
 	/** constructs a vector from the gien points */
 	TemplateVector3(const MathLib::TemplatePoint<T> &a, const MathLib::TemplatePoint<T> &b) :
-		MathLib::TemplatePoint<T>(b[0] - a[0], b[1] - a[1], b[2] - a[2])
+		MathLib::TemplatePoint<T>({b[0] - a[0], b[1] - a[1], b[2] - a[2]})
 	{}
 	~TemplateVector3() {}