t1301-shared-repo: fix forced modes test

diff --git a/diff.h b/diff.h
index 23cd90c2e64cf8be44999be812a0765cbe36c9f8..6703a4fb4f0302f4adf1065e91cd1bb27e5c973a 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -265,4 +265,6 @@ extern int diff_result_code(struct diff_options *, int);
 
 extern void diff_no_index(struct rev_info *, int, const char **, int, const char *);
 
+extern int index_differs_from(const char *def, int diff_flags);
+
 #endif /* DIFF_H */