Update window_activity.py

Protracktor/source/window_activity.py

@@ -89,7 +89,10 @@ def summarize(t,winlist,applist):
         report.write("\n"+"="*60+"\nstarted: "+startt+"\t"+"updated: "+currtime()+"\n"+"="*60)
 
 def plot():
+    try:
         data = pd.read_csv(log2)
+    except FileNotFoundError:
+        return  
     df = pd.DataFrame(data) 
     name = df['Application']
     perc = df['Percentage']