get_sha1() - fix infinite loop on nonexistent stage.

diff --git a/refs.h b/refs.h
index a79cb13cd9027aa451716556207d4619a881b2f7..26255967013c7fa4086681bba7636efb4b0157ec 100644 (file)
--- a/refs.h
+++ b/refs.h
@@ -5,6 +5,7 @@
  * Calls the specified function for each ref file until it returns nonzero,
  * and returns the value
  */
+extern int head_ref(int (*fn)(const char *path, const unsigned char *sha1));
 extern int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1));
 
 /** Reads the refs file specified into sha1 **/