Fixed bug where modulo functions returned float instead of int

clockytracklist.py

@@ -13,13 +13,22 @@ class ClockyTracklist:
         self.__verbose=verbose
         self.__sort=sort
         self.__reloaded=False
+        self.supportedformats=EXTENSIONS
 
         p=Path(self.path)
-        if(not p.is_dir()):
+        if not p.exists():
+            print("ERROR: directory \""+path+"\" does not exist")
+            exit();
+        if not p.is_dir():
             print("ERROR: \""+path+"\" is not an directory")
             exit();
 
         self.__ReadTrackList()
+
+        if self.count==0:
+            print("ERROR: no (supported) files found in directory \""+path+"\"")
+            exit();
+
         if(self.__verbose):
             self.ShowTrackList()