Bug #564

- Fixed bug #564, which allowed the deletion of parent recurring tasks (thanks
  to Peter De Poorter).

src/Task.cpp

@@ -81,6 +81,7 @@ bool Task::operator== (const Task& other)
 ////////////////////////////////////////////////////////////////////////////////
 Task::Task (const std::string& input)
 {
+  id = 0;
   parse (input);
 }