Regression Test: Fix null pointer access (#8922)

* #8921 : Guard null pointer access

* #8921 Fix memory leak

Fix similar memory leak as reported in #8918

ApplicationLibCode/ProjectDataModel/RimEclipseResultAddressCollection.h

@@ -42,8 +42,6 @@ public:
 
     bool isEmpty() const;
 
-    void clear();
-
 private:
     caf::PdmChildArrayField<RimEclipseResultAddress*>      m_adresses;
     caf::PdmField<caf::AppEnum<RiaDefines::ResultCatType>> m_resultType;