ENH: pointMVCWeight : handle zero field. (div by zero)

src/finiteVolume/interpolation/interpolation/interpolationPoint/interpolationPoint.H

@@ -60,7 +60,7 @@ protected:
 public:
 
     //- Runtime type information
-    TypeName("cellPoint");
+    TypeName("point");
 
 
     // Constructors

src/finiteVolume/interpolation/interpolation/interpolationPoint/pointMVCWeight.C

@@ -119,7 +119,15 @@ void Foam::pointMVCWeight::calcWeights
             //Pout<< "    uj:" << u[j] << " ujPlus1:" << u[jPlus1] << endl;
 
             vector temp = u[j] ^ u[jPlus1];
-            temp /= mag(temp);
+
+            scalar magTemp = mag(temp);
+
+            if (magTemp < VSMALL)
+            {
+                continue;
+            }
+
+            temp /= magTemp;
 
             //Pout<< "    uj:" << u[j] << " ujPlus1:" << u[jPlus1]
             //    << " temp:" << temp << endl;