TileByteStream: Fix cppcheck warning.

Pass containers by const reference, not by value.

TileCalorimeter/TileSvc/TileByteStream/TileByteStream/TileOFC.h

 /*
-  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef TILE_OFC_H
@@ -19,7 +19,7 @@ void Double2Int_calib( double calib_constant,
 		       bool verbose=false );
 
 void Double2Int_ofc( int w_off_size, 
-		     std::vector<double> w_off,
+		     const std::vector<double>& w_off,
 		     std::vector<int> &w_dsp, 
 		     int &w_sum_dsp, 
 		     int &scale, 

TileCalorimeter/TileSvc/TileByteStream/src/TileOFC.cxx

 /*
-  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 */
 
 #include <cstdio>
@@ -38,7 +38,7 @@ void Double2Int_calib( double calib, unsigned int &scale, unsigned int &offset,
 
 
 
-void Double2Int_ofc( int w_off_size, vector<double> w_off, vector<int> &w_dsp, int &w_sum_dsp, int &scale, bool verbose )
+void Double2Int_ofc( int w_off_size, const vector<double>& w_off, vector<int> &w_dsp, int &w_sum_dsp, int &scale, bool verbose )
 {
   // Number of bits of the integer word (signed -1 )
   int NumberBits = 16;