added new construct with size

src/OpenFOAM/db/IOobjects/IOPtrList/IOPtrList.C

@@ -63,6 +63,21 @@ Foam::IOPtrList<T>::IOPtrList(const IOobject& io)
 }
 
 
+template<class T>
+Foam::IOPtrList<T>::IOPtrList(const IOobject& io, const label s)
+:
+    regIOobject(io),
+    PtrList<T>(s)
+{
+    if (io.readOpt() != IOobject::NO_READ)
+    {
+        FatalErrorIn("IOPtrList<T>::IOPtrList(const IOobject&, const label)")
+            << "NO_READ must be set if specifying size" << nl
+            << exit(FatalError);
+    }
+}
+
+
 template<class T>
 Foam::IOPtrList<T>::IOPtrList(const IOobject& io, const PtrList<T>& list)
 :

src/OpenFOAM/db/IOobjects/IOPtrList/IOPtrList.H

@@ -70,6 +70,9 @@ public:
         //- Construct from IOobject
         IOPtrList(const IOobject&);
 
+        //- Construct from IOobject with given size
+        IOPtrList(const IOobject&, const label);
+
         //- Construct from IOobject and a PtrList
         IOPtrList(const IOobject&, const PtrList<T>&);