Coverity scan report 1369053

*** CID 1369053:  Code maintainability issues  (UNUSED_VALUE)

/bench/wtperf/wtperf.c: 2558 in main()

2552                            append_comma = ",";

2553                    }

2554                    if (opts->verbose > 1 && strlen(debug_cconfig) != 0) {

2555                            pos += (size_t)snprintf(

2556                                cc_buf + pos, req_len - pos, "%s%s",

2557                                append_comma, debug_cconfig);

>>>     CID 1369053:  Code maintainability issues  (UNUSED_VALUE)

>>>     Assigning value from "","" to "append_comma" here, but that stored value is overwritten before it can be used.

2558                            append_comma = ",";

2559                    }

2560

2561                    if (strlen(cc_buf) != 0 && (ret =

2562                        config_opt_name_value(wtperf, "conn_config", cc_buf)) != 0)

2563                            goto err;