FS-11785 [mod_conference] fix memory leak on realloc failure

                          fix dead assignments in conference_cdr

src/mod/applications/mod_conference/conference_api.c

@@ -300,6 +300,7 @@ switch_status_t conference_api_sub_syntax(char **syntax)
 			}
 		} else {
 			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't realloc\n");
+			switch_safe_free(p);
 			return SWITCH_STATUS_TERM;
 		}
 	}

src/mod/applications/mod_conference/conference_cdr.c

@@ -315,8 +315,6 @@ char *conference_cdr_rfc4579_render(conference_obj_t *conference, switch_event_t
 
 	switch_mutex_unlock(conference->member_mutex);
 
-	off1 = off2 = off3 = off4 = 0;
-
 	xml_text = switch_xml_toxml(xml, SWITCH_TRUE);
 	switch_xml_free(xml);
 
@@ -741,7 +739,6 @@ void conference_cdr_render(conference_obj_t *conference)
 				wrote = write(fd, xml_text, (unsigned) strlen(xml_text));
 				wrote++;
 				close(fd);
-				fd = -1;
 			} else {
 				char ebuf[512] = { 0 };
 				switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error writing [%s][%s]\n",