* lisp/cedet/semantic/analyze/complete.el: Fix completion-at-point

Completion tables are not supposed to signal errors:

    emacs -q
    M-x semantic-mode
    ; visit a file supported by semantic, such as a C file
    ; put cursor in a blank space
    M-x completion-at-point
    It will error with: "Nothing to complete"

(semantic-analyze-possible-completions): Return nil instead of
signaling errors.

1 files changed, 4 insertions, 2 deletions

diff --git a/lisp/cedet/semantic/analyze/complete.el b/lisp/cedet/semantic/analyze/complete.el
index b471c0d1a13..b473ade1594 100644
--- a/lisp/cedet/semantic/analyze/complete.el
+++ b/lisp/cedet/semantic/analyze/complete.el
@@ -93,8 +93,10 @@ in a buffer."
                           context
                         (semantic-analyze-current-context context)))
              (ans (if (not context)
-                      (error "Nothing to complete")
-                    (:override))))
+                      (when (called-interactively-p 'any)
+                        (error "Nothing to complete"))
+                    (with-demoted-errors "%S"
+                      (:override)))))
         ;; If interactive, display them.
         (when (called-interactively-p 'any)
           (with-output-to-temp-buffer "*Possible Completions*"