Add null constructors to crAddressing and crMatrix

src/foam/matrices/crMatrix/crAddressing.C

@@ -65,6 +65,19 @@ void Foam::crAddressing::setRowSizes(const labelList& rowSizes)
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
+// Construct null
+Foam::crAddressing::crAddressing()
+:
+    refCount(),
+    nRows_(0),
+    nCols_(0),
+    rowStart_(1),
+    column_(0)
+{
+    rowStart_[0] = 1;
+}
+
+
 // Construct from given size
 Foam::crAddressing::crAddressing
 (

src/foam/matrices/crMatrix/crAddressing.H

@@ -69,6 +69,7 @@ class crAddressing
         //- Column index array
         labelList column_;
 
+
     // Private Member Functions
 
         //- Set row sizes
@@ -79,6 +80,9 @@ public:
 
     // Constructors
 
+        //- Construct null
+        crAddressing();
+
         //- Construct given size.  Column and coefficients set later
         crAddressing
         (

src/foam/matrices/crMatrix/crMatrix.C

@@ -36,6 +36,15 @@ Author
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
+// Construct null
+Foam::crMatrix::crMatrix()
+:
+    refCount(),
+    crAddr_(),
+    coeffs_()
+{}
+
+
 // Construct from addressing
 Foam::crMatrix::crMatrix(const crAddressing& addr)
 :

src/foam/matrices/crMatrix/crMatrix.H

@@ -67,6 +67,9 @@ public:
 
     // Constructors
 
+        //- Construct null
+        crMatrix();
+
         //- Construct from addressing
         crMatrix(const crAddressing& addr);