style(el): Improve readability of eventloop_posix.c
style(el): Improve readability of eventloop_posix.c

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