Fix a warning for MSVC 2008 for an uninitialized variable in ua_client.c
Fix a warning for MSVC 2008 for an uninitialized variable in ua_client.c

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