particlePhasicFlow bug-fix when flag --set-fields-only is used and no shpaeName is set

utilities/particlesPhasicFlow/particlesPhasicFlow.cpp

@@ -181,6 +181,8 @@ int main( int argc, char* argv[] )
 		&Control.caseSetup()
 	);
 	
+	if(Control.time().lookupObjectName("shapeName"))
+	{
 		auto& shapeName = Control.time().template lookupObject<pFlow::wordPointField_H>("shapeName");
 
 		REPORT(0)<< "Converting shapeName field to shapeIndex field"<<END_REPORT;
@@ -207,6 +209,8 @@ int main( int argc, char* argv[] )
 				shapes.shapeNames()<<pFlow::endl;
 			}
 		}	
+	}
+	
 
     if( !Control.time().write(true))
     {