NTFS: Fix serious data corruption issue when writing.
      Many thanks to Alberto Patino for testing and reporting the data
      corruption.  And many apologies for corrupting his partition.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 5fb341a..a142bf3 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -787,6 +787,7 @@
 				vcn_len = rl[1].vcn - vcn;
 				lcn_block = lcn << (vol->cluster_size_bits -
 						blocksize_bits);
+				cdelta = 0;
 				/*
 				 * If the number of remaining clusters in the
 				 * @pages is smaller or equal to the number of