setInitialMultiRegionDeltaT: update to be consistent with the standard setInitialDeltaT

Resolves bug-report http://bugs.openfoam.org/bug_change_status_page.php

applications/solvers/heatTransfer/chtMultiRegionFoam/include/setInitialMultiRegionDeltaT.H

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -22,7 +22,7 @@ License
     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
 Global
-    setInitialDeltaT
+    setInitialMultiRegionDeltaT
 
 Description
     Set the initial timestep for the CHT MultiRegion solver.
@@ -48,7 +48,7 @@ if (adjustTimeStep)
             min
             (
                 min(maxCo/CoNum, maxDi/DiNum)*runTime.deltaT().value(),
-                maxDeltaT
+                min(runTime.deltaTValue(), maxDeltaT)
             )
         );
         Info<< "deltaT = " <<  runTime.deltaT().value() << endl;