applications: Update ...ErrorIn -> ...ErrorInFunction

Avoids the clutter and maintenance effort associated with providing the
function signature string.

applications/utilities/postProcessing/velocityField/Pe/Pe.C

@@ -241,7 +241,7 @@ void Foam::calc(const argList& args, const Time& runTime, const fvMesh& mesh)
         }
         else
         {
-            FatalErrorIn(args.executable())
+            FatalErrorInFunction
                 << "Incorrect dimensions of phi: " << phi.dimensions()
                     << abort(FatalError);
         }