STYLE: avoid implicit construction

applications/solvers/implicitSolver/faSavageHutterFoam.C

@@ -69,8 +69,7 @@ int main(int argc, char *argv[])
         << "    TOL h " << hResidualMax << nl
         << "    TOL Us " << UsResidualMax << nl << endl;
 
-    Switch initDeltaT =
-        runTime.controlDict().lookup("initDeltaT");
+    Switch initDeltaT(runTime.controlDict().lookup("initDeltaT"));
 
     if (initDeltaT)
     {