Incorrect usage of variable argument macros; use va_start or va_copy to begin processing and va_end to finish

Defect 114011 (STATIC_C)
Checker VARARGS (subcategory none)
File: /src/cursor/cur_join.c
Function __curjoin_get_key
/src/cursor/cur_join.c, line: 681
Initializing va_list "ap".

        va_start(ap, cursor);

/src/cursor/cur_join.c, line: 682
va_end was not called for "ap".

        JOINABLE_CURSOR_API_CALL(cursor, session, get_key, NULL);