fix, must clear the frame

src/zm_analysis_thread.cpp

@@ -29,13 +29,10 @@ int AnalysisThread::run() {
     if ( analysis_update_delay ) {
       cur_time = time( 0 );
       if ( (unsigned int)( cur_time - last_analysis_update_time ) > analysis_update_delay ) {
-Debug(4, "Updating " );
         analysis_rate = monitor->GetAnalysisRate();
         monitor->UpdateAdaptiveSkip();
         last_analysis_update_time = cur_time;
       }
-    } else {
-Debug(4, "Not Updating " );
     }
 
     if ( !monitor->Analyse() ) {