NTFS: Fix compilation when configured read-only.

- Add ifdef NTFS_RW around write specific code if fs/ntfs/runlist.[hc] and
  fs/ntfs/attrib.[hc].
- Minor bugfix to fs/ntfs/attrib.c::ntfs_attr_make_non_resident() where the
  runlist was not freed in all error cases.
- Add fs/ntfs/runlist.[hc]::ntfs_rl_find_vcn_nolock().

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/runlist.h b/fs/ntfs/runlist.h
index 60c42f3..cf5c1b4 100644
--- a/fs/ntfs/runlist.h
+++ b/fs/ntfs/runlist.h
@@ -2,7 +2,7 @@
  * runlist.h - Defines for runlist handling in NTFS Linux kernel driver.
  *	       Part of the Linux-NTFS project.
  *
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2005 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
  *
  * This program/include file is free software; you can redistribute it and/or
@@ -78,6 +78,11 @@
 
 extern LCN ntfs_rl_vcn_to_lcn(const runlist_element *rl, const VCN vcn);
 
+#ifdef NTFS_RW
+
+extern runlist_element *ntfs_rl_find_vcn_nolock(runlist_element *rl,
+		const VCN vcn);
+
 extern int ntfs_get_size_for_mapping_pairs(const ntfs_volume *vol,
 		const runlist_element *rl, const VCN start_vcn);
 
@@ -88,4 +93,6 @@
 extern int ntfs_rl_truncate_nolock(const ntfs_volume *vol,
 		runlist *const runlist, const s64 new_length);
 
+#endif /* NTFS_RW */
+
 #endif /* _LINUX_NTFS_RUNLIST_H */