Fix an "implicit function definition" warning.

diff --git a/diff.h b/diff.h
index 7a347cf77d448817014ceeaed2d3cd99b5894ac6..eece65ddccdb7bd8bf51af80af92e29b4eb76f37 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -222,6 +222,7 @@ extern int run_diff_files(struct rev_info *revs, int silent_on_removed);
 
 extern int run_diff_index(struct rev_info *revs, int cached);
 
+extern int do_diff_cache(const unsigned char *, struct diff_options *);
 extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
 
 #endif /* DIFF_H */