Resolved problems with Clang compilation

applications/solvers/modules/fluid/fluidSolver/fluidSolver.H

@@ -84,9 +84,6 @@ class fluidSolver
         //- Current maximum Courant number
         scalar CoNum;
 
-        //- Current mean Courant number
-        scalar meanCoNum;
-
 
     // Private Member Functions
 

src/lagrangian/parcel/submodels/Momentum/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.C

@@ -26,6 +26,7 @@ License
 #include "SurfaceFilmModel.H"
 #include "UPtrList.H"
 #include "surfaceFilm.H"
+#include "surfaceFields.H"
 #include "mathematicalConstants.H"
 
 using namespace Foam::constant;