If a breakpoint is not user visible, then there's no point in

bothering the frontend about it...  This is the exact same check MI
does.

I also smoke tested Emacs 23 in gud-gdb mode, both annotations=2
and annotations=3.  I didn't notice anything break.

gdb/
2013-01-22  Pedro Alves  <palves@redhat.com>

	* annotate.c (breakpoint_changed): Skip if breakpoint is not
	user-visible.

gdb/testsuite/
2013-01-22  Pedro Alves  <palves@redhat.com>

	* gdb.base/annota1.exp (signal sent): No longer expect
	breakpoints-invalid.
	* gdb.cp/annota2.exp (continue until exit)
	(watch triggered on a.x): Ditto.

1 files changed, 3 insertions, 0 deletions

diff --git a/gdb/annotate.c b/gdb/annotate.c
index d82daa2919c..ccba5fe67a1 100644
--- a/gdb/annotate.c
+++ b/gdb/annotate.c
@@ -575,6 +575,9 @@ annotate_display_prompt (void)
 static void
 breakpoint_changed (struct breakpoint *b)
 {
+  if (b->number <= 0)
+    return;
+
   annotate_breakpoints_invalid ();
 }