Minor changes to math module

-Fixed missing Set method: "X::Set(const X&)"
-Removed operator String


Former-commit-id: 690f161704ed85fc57a62b812af7933e390572b5

include/Nazara/Math/Vector2.hpp

@@ -45,6 +45,7 @@ class NzVector2
 		NzVector2& Set(T X, T Y);
 		NzVector2& Set(T scale);
 		NzVector2& Set(const T vec[2]);
+		NzVector2& Set(const NzVector2& vec);
 		template<typename U> NzVector2& Set(const NzVector2<U>& vec);
 
 		T SquaredDistance(const NzVector2& vec) const;
@@ -52,8 +53,6 @@ class NzVector2
 
 		NzString ToString() const;
 
-		operator NzString() const;
-
 		operator T*();
 		operator const T*() const;