+ fix memory leaks

src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp

@@ -118,7 +118,6 @@ void ViewProviderFemConstraintForce::updateData(const App::Property* prop)
     if (pShapeSep->getNumChildren() == 0) {
         // Set up the nodes
         SoMultipleCopy* cp = new SoMultipleCopy();
-        cp->ref();
         cp->matrix.setNum(0);
         cp->addChild((SoNode*)createArrow(ARROWLENGTH, ARROWHEADRADIUS));
         pShapeSep->addChild(cp);

src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp

@@ -100,7 +100,6 @@ void ViewProviderFemConstraintPressure::updateData(const App::Property* prop)
     if (pShapeSep->getNumChildren() == 0) {
         // Set up the nodes
         SoMultipleCopy* cp = new SoMultipleCopy();
-        cp->ref();
         cp->matrix.setNum(0);
         cp->addChild((SoNode*)createArrow(ARROWLENGTH, ARROWHEADRADIUS));
         pShapeSep->addChild(cp);

src/Mod/Fem/Gui/ViewProviderFemMesh.cpp

@@ -232,6 +232,7 @@ ViewProviderFemMesh::~ViewProviderFemMesh()
     pcMatBinding->unref();
     pcPointMaterial->unref();
     pcPointStyle->unref();
+    pcAnoCoords->unref();
 }
 
 void ViewProviderFemMesh::attach(App::DocumentObject *pcObj)