From David Callu, warning fixes and removal of spaces at end of lines.

include/osgAnimation/Action

@@ -46,7 +46,7 @@ namespace osgAnimation
 
             META_Object(osgAnimation,Callback);
 
-            virtual void operator()(Action* action, osgAnimation::ActionVisitor* nv) {}
+            virtual void operator()(Action* /*action*/, osgAnimation::ActionVisitor* /*nv*/) {}
 
             Callback* getNestedCallback() { return _nestedCallback.get(); }
             void addNestedCallback(Callback* callback)
@@ -119,7 +119,7 @@ namespace osgAnimation
         // get the number of loop, the frame relative to loop.
         // return true if in range, and false if out of range.
         bool evaluateFrame(unsigned int frame, unsigned int& resultframe, unsigned int& nbloop );
-        virtual void traverse(ActionVisitor& visitor) {}
+        virtual void traverse(ActionVisitor& /*visitor*/) {}
         //virtual void evaluate(unsigned int frame);
 
     protected:

include/osgAnimation/AnimationUpdateCallback

@@ -42,7 +42,7 @@ namespace osgAnimation
         META_Object(osgAnimation, AnimationUpdateCallback<T>);
 
         const std::string& getName() const { return T::getName(); }
-        bool link(Channel* channel) { return 0; }
+        bool link(Channel* /*channel*/) { return 0; }
         int link(Animation* animation)
         {
             if (T::getName().empty())

include/osgAnimation/MorphGeometry

@@ -40,7 +40,7 @@ namespace osgAnimation
         public:
             MorphTarget(osg::Geometry* geom, float w = 1.0) : _geom(geom), _weight(w) {}
             void setWeight(float weight) { _weight = weight; }
-            const float getWeight() const { return _weight; }
+            float getWeight() const { return _weight; }
             osg::Geometry* getGeometry() { return _geom.get(); }
             const osg::Geometry* getGeometry() const { return _geom.get(); }
             void setGeometry(osg::Geometry* geom) { _geom = geom; }