Add debug in Ready(). Reset image_count in Reload so that Ready() works after a reload.

src/zm_monitor.cpp

@@ -562,6 +562,7 @@ void Monitor::Load(MYSQL_ROW dbrow, bool load_zones=true, Purpose p = QUERY) {
   // How many frames we need to have before we start analysing
   ready_count = std::max(warmup_count, pre_event_count);
 
+  image_count = 0;
   last_alarm_count = 0;
   state = IDLE;
   last_signal = true;   // Defaulting to having signal so that we don't get a signal change on the first frame.

src/zm_monitor.h

@@ -709,6 +709,7 @@ public:
       return false;
     }
     if (image_count >= ready_count) {
+      Debug(2, "Ready because image_count(%d) >= ready_count(%d)", image_count, ready_count);
       return true;
     }
     Debug(2, "Not ready because image_count(%d) <= ready_count(%d)", image_count, ready_count);