Merge branch 'jk/maint-null-in-trees' into maint-1.7.11

"git diff" had a confusion between taking data from a path in the
working tree and taking data from an object that happens to have
name 0{40} recorded in a tree.

* jk/maint-null-in-trees:
  fsck: detect null sha1 in tree entries
  do not write null sha1s to on-disk index
  diff: do not use null sha1 as a sentinel value

1 files changed, 1 insertions, 1 deletions

diff --git a/builtin.h b/builtin.h
index cd9141932..dffb34ef4 100644
--- a/builtin.h
+++ b/builtin.h
@@ -44,7 +44,7 @@ extern int check_pager_config(const char *cmd);
 struct diff_options;
 extern void setup_diff_pager(struct diff_options *);
 
-extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, char **buf, unsigned long *buf_size);
+extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, int sha1_valid, char **buf, unsigned long *buf_size);
 
 extern int cmd_add(int argc, const char **argv, const char *prefix);
 extern int cmd_annotate(int argc, const char **argv, const char *prefix);