cid#1371235 Missing move assignment operator

Change-Id: If5fc8d783211a131711b5961d6b076c24dd64412

include/vcl/gradient.hxx

@@ -61,6 +61,7 @@ private:
 public:
                     Gradient();
                     Gradient( const Gradient& rGradient );
+                    Gradient( Gradient&& rGradient );
                     Gradient( GradientStyle eStyle,
                               const Color& rStartColor,
                               const Color& rEndColor );
@@ -95,6 +96,7 @@ public:
     void            GetBoundRect( const Rectangle& rRect, Rectangle &rBoundRect, Point& rCenter ) const;
 
     Gradient&       operator=( const Gradient& rGradient );
+    Gradient&       operator=( Gradient&& rGradient );
     bool            operator==( const Gradient& rGradient ) const;
     bool            operator!=( const Gradient& rGradient ) const
                         { return !(Gradient::operator==( rGradient )); }

vcl/source/gdi/gradient.cxx

@@ -77,6 +77,11 @@ Gradient::Gradient( const Gradient& rGradient ) :
 {
 }
 
+Gradient::Gradient( Gradient&& rGradient ) :
+    mpImplGradient( std::move(rGradient.mpImplGradient) )
+{
+}
+
 Gradient::Gradient( GradientStyle eStyle,
                     const Color& rStartColor, const Color& rEndColor ) :
     mpImplGradient()
@@ -225,6 +230,12 @@ Gradient& Gradient::operator=( const Gradient& rGradient )
     return *this;
 }
 
+Gradient& Gradient::operator=( Gradient&& rGradient )
+{
+    mpImplGradient = std::move(rGradient.mpImplGradient);
+    return *this;
+}
+
 bool Gradient::operator==( const Gradient& rGradient ) const
 {
     return mpImplGradient == rGradient.mpImplGradient;