Handle correctly the case where lastpath has been removed

fluent_dir_input.py

@@ -43,11 +43,11 @@ class FluentDirInput(object):
   def sendAll(self):
     path_list = glob.glob(self.path_spec)
     lastpath = self.get_lastpath()
-    if lastpath:
+    if lastpath and lastpath not in path_list:
       path_list.insert(0, lastpath)
     path_list = sorted(path_list)
     if lastpath:
-      start_index = path_list.index(lastpath) + 2
+      start_index = path_list.index(lastpath) + 1
     else:
       start_index = 0
     for filepath in path_list[start_index:]: