Bugfix: empty wedge patch in parallel. Zeljko Tukovic

src/foam/fields/PointPatchFieldTemplates/constraint/wedge/WedgePointPatchField.C

@@ -201,6 +201,9 @@ WedgePointPatchField
 (
     const Pstream::commsTypes commsType
 )
+{
+    // ZT, 26/02/2017: Size of the patch could be zero in parallel runs
+    if (!this->patch().meshPoints().empty())
     {
         // In order to ensure that the wedge patch is always flat, take the
         // normal vector from the first point
@@ -221,6 +224,7 @@ WedgePointPatchField
             iF[meshPoints[pointI]] = values[pointI];
         }
     }
+}
 
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //