Coverity #1339897 and #1339898

*** CID 1339898:  Memory - corruptions  (OVERRUN)

/src/cursor/cur_join.c: 40 in __curjoin_entry_iter_init()

34      to_dup = entry->ends[0].cursor;

35

36      uri = to_dup->uri;

37      if (F_ISSET((WT_CURSOR *)cjoin, WT_CURSTD_RAW))

38              config = &raw_cfg[0];

39      else

>>>     CID 1339898:  Memory - corruptions  (OVERRUN)

>>>     Assigning: "config" = "&def_cfg[0]". "config" now points to element 0 of "def_cfg" (which consists of 2 8-byte elements).

40              config = &def_cfg[0];

41

42      if (cjoin->projection != NULL) {

43              size = strlen(uri) + strlen(cjoin->projection) + 1;

44              WT_ERR(__wt_calloc(session, size, 1, &uribuf));

45              snprintf(uribuf, size, "%s%s", uri, cjoin->projection);

** CID 1339897:  Resource leaks  (RESOURCE_LEAK)

/ext/extractors/csv/csv_extractor.c: 101 in csv_extract()

*** CID 1339897:  Resource leaks  (RESOURCE_LEAK)

/ext/extractors/csv/csv_extractor.c: 101 in csv_extract()

95              if ((copy = malloc(len + 1)) == NULL)

96                      return (errno);

97              strncpy(copy, p, len);

98              copy[len] = '\0';

99              if (csv_extractor->format_isnum) {

100                             if ((val = atoi(copy)) < 0)

>>>     CID 1339897:  Resource leaks  (RESOURCE_LEAK)

>>>     Variable "copy" going out of scope leaks the storage it points to.

101                                     return (EINVAL);

102                             result_cursor->set_key(result_cursor, val);

103                     } else

104                             result_cursor->set_key(result_cursor, copy);

105                     ret = result_cursor->insert(result_cursor);

106                     free(copy);