fix delta time calculation in PerformanceSearch_p for the 1. entry

(INITIALIZATION displayed absolute date, set delta to 0 for 1. entry)

htroot/PerformanceSearch_p.java

@@ -51,7 +51,7 @@ public class PerformanceSearch_p {
                 prop.put("table_" + c + "_event", search.processName.name());
                 prop.put("table_" + c + "_comment", search.comment);
                 prop.putNum("table_" + c + "_count", search.resultCount);
-                prop.putNum("table_" + c + "_delta", event.getTime() - lastt);
+                prop.putNum("table_" + c + "_delta", (c == 0 ? lastt : event.getTime() - lastt));
                 prop.put("table_" + c + "_time", event.getFormattedDate());
                 prop.putNum("table_" + c + "_duration", search.duration);
                 c++;