dialog: use static holders for statistics loaded at startup

This prevents OpenSIPS from crashing because the statistics were not yet
initialized. This fix is needed due to the revert of the previous two
commits, related to the start of OpenSIPS on child init.

modules/dialog/dlg_db_handler.c

@@ -605,12 +605,6 @@ static int load_dialog_info_from_db(int dlg_hash_size)
 			dlg->start_ts	= VAL_INT(values+6);
 
 			dlg->state 		= VAL_INT(values+7);
-			if (dlg->state==DLG_STATE_CONFIRMED_NA ||
-			dlg->state==DLG_STATE_CONFIRMED) {
-				active_dlgs_cnt++;
-			} else if (dlg->state==DLG_STATE_EARLY) {
-				early_dlgs_cnt++;
-			}
 
 			GET_STR_VALUE(cseq1, values, 9 , 1, 1);
 			GET_STR_VALUE(cseq2, values, 10 , 1, 1);
@@ -737,8 +731,12 @@ static int load_dialog_info_from_db(int dlg_hash_size)
 				ref_dlg_unsafe(dlg, 1);
 			}
 
-			update_dlg_stats(dlg, +1);
-
+			if (dlg->state==DLG_STATE_CONFIRMED_NA ||
+			dlg->state==DLG_STATE_CONFIRMED) {
+				active_dlgs_cnt++;
+			} else if (dlg->state==DLG_STATE_EARLY) {
+				early_dlgs_cnt++;
+			}
 			run_load_callback_per_dlg(dlg);
 
 			next_dialog:;