UPtrList: Added append for consistency with PtrList

src/OpenFOAM/containers/Lists/UPtrList/UPtrList.H

@@ -128,6 +128,9 @@ public:
             //- Clear the UPtrList, i.e. set size to zero
             void clear();
 
+            //- Append an element at the end of the list
+            inline void append(T*);
+
             //- Transfer the contents of the argument UPtrList into this
             //  UPtrList and annul the argument list
             void transfer(UPtrList<T>&);

src/OpenFOAM/containers/Lists/UPtrList/UPtrListI.H

@@ -74,6 +74,15 @@ inline void Foam::UPtrList<T>::resize(const label newSize)
 }
 
 
+template<class T>
+inline void Foam::UPtrList<T>::append(T* ptr)
+{
+    label sz = this->size();
+    this->setSize(sz+1);
+    this->ptrs_[sz] = ptr;
+}
+
+
 template<class T>
 inline bool Foam::UPtrList<T>::set(const label i) const
 {