cdr_adaptive_odbc: Also apply a filter when the CDR value is empty.

Extra CDR records are written if a filtered CDR value is empty because the
filter is not checked.

(closes issue ASTERISK-22272)
Reported by: Jordi Llull Chavarria
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Merged revisions 401577 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 401579 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 401581 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@401582 65c4cc65-6c06-0410-ace0-fbb531ad65f3

cdr/cdr_adaptive_odbc.c

@@ -720,6 +720,14 @@ static int odbc_log(struct ast_cdr *cdr)
 					continue;
 				}
 				first = 0;
+			} else if (entry->filtervalue
+				&& ((!entry->negatefiltervalue && entry->filtervalue[0] != '\0')
+					|| (entry->negatefiltervalue && entry->filtervalue[0] == '\0'))) {
+				ast_verb(4, "CDR column '%s' was not set and does not match filter of"
+					" %s'%s'.  Cancelling this CDR.\n",
+					entry->cdrname, entry->negatefiltervalue ? "!" : "",
+					entry->filtervalue);
+				goto early_release;
 			}
 		}