grep.c: remove implicit dependency on the_index

diff --git a/notes.h b/notes.h
index 0433f45db55b5b807abcd633f507e9c75324d4e6..414bc6855ad1593fb281f6a829797b34f3fb2e12 100644 (file)
--- a/notes.h
+++ b/notes.h
@@ -3,6 +3,9 @@
 
 #include "string-list.h"
 
+struct object_id;
+struct strbuf;
+
 /*
  * Function type for combining two notes annotating the same object.
  *