grt: Fix boxToGlobalRouting function
grt: Fix boxToGlobalRouting function

Signed-off-by: luis201420 <e486c76f62c291d3f723513a84774f0871a6954f@hotmail.com>

The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD