gp4par: do not add loops in netlist when a net is sourced by an inout port
gp4par: do not add loops in netlist when a net is sourced by an inout port

azonenberg/openfpga,azonenberg/openfpga,azonenberg/openfpga,rqou/openfpga,rqou/openfpga,rqou/openfpga,azonenberg/openfpga,azonenberg/openfpga,rqou/openfpga,rqou/openfpga