Copy by ref, fix unable to find rules warning garbage

apps/openmw/mwrender/animation.cpp

@@ -776,8 +776,8 @@ namespace MWRender
                 blendRules
                     = mResourceSystem->getAnimBlendRulesManager()->getRules(globalBlendConfigPath, blendConfigPath);
                 if (blendRules == nullptr)
-                    Log(Debug::Warning) << "Unable to find animation blending rules: '" << blendConfigPath.value()
-                                        << "' or '" << globalBlendConfigPath.value() << "'";
+                    Log(Debug::Warning) << "Unable to find animation blending rules: '" << yamlpath << "' or '"
+                                        << globalBlendConfigPath.value() << "'";
             }
             else
             {

apps/openmw/mwrender/animblendcontroller.cpp

@@ -324,8 +324,8 @@ namespace MWRender
                 MWRender::RotateController* rotateController = dynamic_cast<MWRender::RotateController*>(updateCb);
                 if (rotateController)
                 {
-                    const osg::Quat rotate = rotateController->getRotate();
-                    const osg::Vec3f offset = rotateController->getOffset();
+                    const osg::Quat& rotate = rotateController->getRotate();
+                    const osg::Vec3f& offset = rotateController->getOffset();
 
                     osg::NodePathList nodepaths = node->getParentalNodePaths(rotateController->getRelativeTo());
                     osg::Quat worldOrient;