Update ua_namespace.py
Update ua_namespace.py

Added dummy statement to ensure variable "retval" is used in every build option.
StalderT/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541,StalderT/open62541,AGIsmail/open62541,AGIsmail/open62541,StalderT/open62541,JGrothoff/open62541,StalderT/open62541,bostjanv/open62541,JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,jpfr/open62541,bostjanv/open62541,open62541/open62541,open62541/open62541,open62541/open62541,jpfr/open62541