fast-import: Don't use a maybe-clobbered errno value

diff --git a/delta.h b/delta.h
index 727ae30e9eb973b2bd4a512be78041fee40fa039..40ccf5a1e95f62d840a006274f7024fa43208b1c 100644 (file)
--- a/delta.h
+++ b/delta.h
@@ -18,9 +18,18 @@ create_delta_index(const void *buf, unsigned long bufsize);
 
 /*
  * free_delta_index: free the index created by create_delta_index()
+ *
+ * Given pointer must be what create_delta_index() returned, or NULL.
  */
 extern void free_delta_index(struct delta_index *index);
 
+/*
+ * sizeof_delta_index: returns memory usage of delta index
+ *
+ * Given pointer must be what create_delta_index() returned, or NULL.
+ */
+extern unsigned long sizeof_delta_index(struct delta_index *index);
+
 /*
  * create_delta: create a delta from given index for the given buffer
  *