continued work on portevent, can't access size of the buffer list

without making it public, so I need to add a method to do that.

portevent.cxx

@@ -5,6 +5,8 @@
 
 PortEvent::PortEvent()
 {
+      /* if a port occurs in less than X percent of all these packets... */
+      low_port_threshold = 5; /* 5% */
 }
 
 PortEvent::~PortEvent()
@@ -14,8 +16,18 @@ PortEvent::~PortEvent()
 bool PortEvent::process_packet(LIDSBuffer* buff)
 {
       IN();
-      OUTd(false);
-      return false;
+      bool threw_alarm = false;
+
+      for (u_int i = 0; i < buff->get_packet_count(); i++) {
+            /*
+             * grab port, add to a list, tell if the list has x% or less of
+             * those ports in the packets
+             */
+            /* do something with the packet */
+      }
+
+      OUTd(threw_alarm);
+      return threw_alarm;
 }
 
 char* PortEvent::get_event_name()

portevent.h

@@ -14,6 +14,7 @@ class PortEvent: public LIDSEvent {
             char* get_event_name();
 
       private:
+            int low_port_threshold;
 
 
 };