Fem: Update constraint symbol rotation

Author: marioalexis84

src/Mod/Fem/Gui/ViewProviderFemConstraint.cpp

@@ -200,9 +200,19 @@ void ViewProviderFemConstraint::handleChangedPropertyName(Base::XMLReader& reade
     }
 }
 
+void ViewProviderFemConstraint::setRotateSymbol(bool rotate)
+{
+    rotateSymbol = rotate;
+    updateSymbol();
+}
+
 void ViewProviderFemConstraint::updateSymbol()
 {
     auto obj = this->getObject<const Fem::Constraint>();
+    if (!obj) {
+        return;
+    }
+
     const std::vector<Base::Vector3d>& points = obj->Points.getValue();
     const std::vector<Base::Vector3d>& normals = obj->Normals.getValue();
     if (points.size() != normals.size()) {

src/Mod/Fem/Gui/ViewProviderFemConstraint.h

@@ -131,11 +131,6 @@ inline bool ViewProviderFemConstraint::getRotateSymbol() const
     return rotateSymbol;
 }
 
-inline void ViewProviderFemConstraint::setRotateSymbol(bool rotate)
-{
-    rotateSymbol = rotate;
-}
-
 using ViewProviderFemConstraintPython = Gui::ViewProviderFeaturePythonT<ViewProviderFemConstraint>;