COMP: max: add explicit type. See #1726.

src/atmosphericModels/derivedFvPatchFields/wallFunctions/atmAlphatkWallFunction/atmAlphatkWallFunctionFvPatchScalarField.C

@@ -249,7 +249,7 @@ void atmAlphatkWallFunctionFvPatchScalarField::updateCoeffs()
 
     // lower bound values to avoid unrealistic
     // negative temperatures on the ground
-    alphatw = max(alphatw, 0.01);
+    alphatw = max(alphatw, scalar(0.01));
 
     fixedValueFvPatchField<scalar>::updateCoeffs();
 }

src/atmosphericModels/derivedFvPatchFields/wallFunctions/atmNutUWallFunction/atmNutUWallFunctionFvPatchScalarField.C

@@ -90,7 +90,7 @@ tmp<scalarField> atmNutUWallFunctionFvPatchScalarField::calcNut() const
 
     if (boundNut_)
     {
-        nutw = max(nutw, 0.0);
+        nutw = max(nutw, scalar(0.0));
     }
 
     return tnutw;

src/atmosphericModels/derivedFvPatchFields/wallFunctions/atmNutkWallFunction/atmNutkWallFunctionFvPatchScalarField.C

@@ -98,7 +98,7 @@ tmp<scalarField> atmNutkWallFunctionFvPatchScalarField::calcNut() const
 
     if (boundNut_)
     {
-        nutw = max(nutw, 0.0);
+        nutw = max(nutw, scalar(0.0));
     }
 
     return tnutw;