Fixes #65689. PDO_Firebrid / exec() does not free allocated statement.

Author: madorin

ext/pdo_firebird/firebird_driver.c

@@ -238,14 +238,16 @@ static zend_long firebird_handle_doer(pdo_dbh_t *dbh, const char *sql, size_t sq
 	/* execute the statement */
 	if (isc_dsql_execute2(H->isc_status, &H->tr, &stmt, PDO_FB_SQLDA_VERSION, &in_sqlda, &out_sqlda)) {
 		RECORD_ERROR(dbh);
-		return -1;
+		ret = -1;
+		goto free_statement;
 	}
 
 	/* find out how many rows were affected */
 	if (isc_dsql_sql_info(H->isc_status, &stmt, sizeof(info_count), const_cast(info_count),
 			sizeof(result),	result)) {
 		RECORD_ERROR(dbh);
-		return -1;
+		ret = -1;
+		goto free_statement;
 	}
 
 	if (result[0] == isc_info_sql_records) {
@@ -265,6 +267,12 @@ static zend_long firebird_handle_doer(pdo_dbh_t *dbh, const char *sql, size_t sq
 		RECORD_ERROR(dbh);
 	}
 
+free_statement:
+
+	if (isc_dsql_free_statement(H->isc_status, &stmt, DSQL_drop)) {
+		RECORD_ERROR(dbh);
+	}
+
 	return ret;
 }
 /* }}} */