fix hang in git fetch if pointed at a 0 length bundle

diff --git a/RelNotes b/RelNotes
index 907613e8c4302b2b3a47dae382af3f6186d67e2f..d30cd7e62f7164978833e9ac148e3c041e996681 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes/1.7.7.4.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.8.2.txt
\ No newline at end of file