Replaced ref_ptr<>:take with ref_ptr<>:release, and added handling of removeal

of ref_ptr<> operator >.

src/osgFX/AnisotropicLighting.cpp

@@ -105,7 +105,7 @@ namespace
                 *(image->data(j, i)+2) = static_cast<unsigned char>(blue * 255);
             }
         }
-        return image.take();
+        return image.release();
     }
 
 }

src/osgFX/BumpMapping.cpp

@@ -108,7 +108,7 @@ namespace
 
                 tc->push_back(uv * scale);
             }
-            return tc.take();
+            return tc.release();
         }
 
     private:

src/osgFX/Cartoon.cpp

@@ -33,7 +33,7 @@ namespace
             *(image->data(i, 0)+2) = static_cast<unsigned char>(c*255);
             *(image->data(i, 0)+3) = 255;
         }
-        return image.take();
+        return image.release();
     }
 
 }