refactor(core): Cosmetic improvements in ua_types_encoding_json.c
refactor(core): Cosmetic improvements in ua_types_encoding_json.c

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