ncd: NCDInterpreter: avoid a loop over all statements in process_free() if no statement memory was allocated
ncd: NCDInterpreter: avoid a loop over all statements in process_free() if no statement memory was allocated

SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn