BUGFIX. Do not increase well index for shut wells.

Shut wells are not added to the well list and the well index should
therefore not be increased when well control is set. This is similar to
whats is done for shut wells in createWellsFromSpecs.

opm/core/wells/WellsManager.cpp

@@ -412,8 +412,7 @@ namespace Opm
             }
 
             if (well->getStatus(timeStep) == WellCommon::SHUT) {
-                //well_controls_shut_well( w_->ctrls[well_index] );
-                well_index++;
+                //SHUT wells are not added to the well list
                 continue;
             }