zero() method added to all point classes

Only some of the mPointX classes had the zero() method implemented.
This commit adds the method to all point classes.

Engine/source/math/mPoint2.h

@@ -48,6 +48,7 @@ class Point2I
    void set(S32 in_x, S32 in_y);            ///< Set (x,y) position
    void setMin(const Point2I&);             ///< Store lesser co-ordinates from parameter in this point.
    void setMax(const Point2I&);             ///< Store greater co-ordinates from parameter in this point.
+   void zero();                             ///< Zero all values
 
    //-------------------------------------- Math mutators
    void neg();                              ///< Invert sign of point's co-ordinates.
@@ -123,6 +124,8 @@ class Point2F
    /// @param   c   Interpolation factor (0.0 .. 1.0).
    void interpolate(const Point2F& a, const Point2F& b, const F32 c);
 
+   void zero();                         ///< Zero all values
+
    operator F32*() { return &x; }
    operator const F32*() const { return &x; }
 
@@ -213,6 +216,8 @@ class Point2D
    /// @param   c   Interpolation factor (0.0 .. 1.0).
    void interpolate(const Point2D &a, const Point2D &b, const F64 c);
 
+   void zero();                         ///< Zero all values
+
    operator F64*() { return &x; }
    operator const F64*() const { return &x; }
 
@@ -301,6 +306,12 @@ inline void Point2I::setMax(const Point2I& _test)
 }
 
 
+inline void Point2I::zero()
+{
+   x = y = 0;
+}
+
+
 inline void Point2I::neg()
 {
    x = -x;
@@ -483,6 +494,12 @@ inline void Point2F::interpolate(const Point2F& _rFrom, const Point2F& _to, cons
 }
 
 
+inline void Point2F::zero()
+{
+   x = y = 0.0f;
+}
+
+
 inline bool Point2F::isZero() const
 {
    return (x == 0.0f) && (y == 0.0f);
@@ -720,6 +737,12 @@ inline void Point2D::interpolate(const Point2D& _rFrom, const Point2D& _to, cons
 }
 
 
+inline void Point2D::zero()
+{
+   x = y = 0.0;
+}
+
+
 inline bool Point2D::isZero() const
 {
    return (x == 0.0f) && (y == 0.0f);