refactor(pubsub): Inline a small method to simplify ua_pubsub_reader.c
refactor(pubsub): Inline a small method to simplify ua_pubsub_reader.c

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