fix glaring bug in timestamp for refractory filter,

now the dt is correct (it was wrong by 10^12!)

src/net/sf/jaer/eventprocessing/filter/RefractoryFilter.java

@@ -90,7 +90,7 @@ synchronized public EventPacket filterPacket(EventPacket in) {
             short x = (short) (i.x >>> subsampleBy), y = (short) (i.y >>> subsampleBy);
             int lastt = lastTimestamps[x][y];
             int deltat = (ts - lastt);
-            boolean longISI = lastt == DEFAULT_TIMESTAMP || deltat > correlationTimeS*1e-6f; // if refractoryPeriodUs==0, then all events with ISI==0 pass if passShortISIsEnabled
+            boolean longISI = lastt == DEFAULT_TIMESTAMP || deltat > correlationTimeS*1e6f; // if refractoryPeriodUs==0, then all events with ISI==0 pass if passShortISIsEnabled
             if ((longISI && !passShortISIsEnabled) || (!longISI && passShortISIsEnabled)) {
 //                BasicEvent o = (BasicEvent) outItr.nextOutput();
 //                o.copyFrom(i);