Merge changes from CEDET upstream.

Merge changes from CEDET upstream.

* semantic.el (semantic-error-if-unparsed): New function.  Raise
  error if buffer was not parsed by Semantic (bug #12045).
  (navigate-menu, edit-menu, cedet-menu-map): Enable Semantic items
  only if buffer was parsed.  Also, replace ':active' with ':enable'
  where necessary.

* semantic/wisent/python.el
  (semantic-python-get-system-include-path): Use
  `python-shell-internal-send-string' if available to query Python
  for system paths.

* semantic/senator.el (senator-next-tag):
  (senator-previous-tag):
  (senator-go-to-up-reference): Use `semantic-error-if-unparsed'.

* semantic/complete.el (semantic-complete-jump-local):
  (semantic-complete-jump):
  (semantic-complete-jump-local-members):
  (semantic-complete-self-insert): Use `semantic-error-if-unparsed'.
  (semantic-complete-inline-project): Fix autoload cookie.

* semantic/analyze/complete.el
  (semantic-analyze-possible-completions): Check if buffer was
  parsed.  Only raise an error if function was called interactively,
  otherwise silently return nil.

* cedet.el (cedet-menu-map): Fix copy&paste typo in menu creation.