COMP: various compilation changes

- label-size 64 build, compiler warnings, unused template argument,
  faMatrix::clone() method

STYLE: faScalarMatrix - moved info message to within a debug scope

applications/utilities/finiteArea/makeFaMesh/makeFaMesh.C

@@ -218,7 +218,7 @@ int main(int argc, char *argv[])
     {
         label curMeshEdge = meshEdges[edgeI];
 
-        labelList curEdgePatchIDs(2, -1);
+        labelList curEdgePatchIDs(2, label(-1));
 
         label patchI = -1;