Merge branch '2677-no-se-elimina-parent-id-entre-modulos-del-mismo-agente' into 'develop'

Fixed bug in modules deletion: parent id set to 0 in case parent has been deleted

See merge request artica/pandorafms!1961

pandora_server/util/pandora_db.pl

@@ -298,6 +298,8 @@ sub pandora_purgedb ($$) {
 	    my $buffer = 1000;
 	    my $id_module = $module->{'id_agente_modulo'};
 
+		db_do ($dbh, 'UPDATE tagente_modulo SET parent_module_id=0 WHERE parent_module_id=?', $id_module);
+
 		log_message ('', ".");
 		
 		while(1) {