Value returned from a function is not checked for errors before being used

Defect 72681 (STATIC_C)
Checker CHECKED_RETURN (subcategory none)
File: /src/mongo/util/time_support.cpp
Function mongo::<unnamed>::_dateToISOString(mongo::Date_t, bool, mongo::<unnamed>::DateStringBuffer *)
/src/mongo/util/time_support.cpp, line: 232
Calling "strftime" without checking return value (as is done elsewhere 3 out of 4 times).

                strftime(cur, bufRemaining, "%z", &t);