style(pubsub): Cosmetic improvements in ua_pubsub_writer.c
style(pubsub): Cosmetic improvements in ua_pubsub_writer.c

StalderT/open62541,open62541/open62541,jpfr/open62541,open62541/open62541,StalderT/open62541,StalderT/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,StalderT/open62541,JGrothoff/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541