udf: Init/maintain file entry checkpoint field

In accordance with ECMA 1.67 Part 4, 14.9.15, the checkpoint field
should be initialized to 1 at creation. (Zero is *not* a valid value.)

Signed-off-by: Steven P. Nickel <snickel@focusinfo.com>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 05ab481..7e5aae4 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -116,6 +116,7 @@
 	iinfo->i_lenEAttr = 0;
 	iinfo->i_lenAlloc = 0;
 	iinfo->i_use = 0;
+	iinfo->i_checkpoint = 1;
 	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
 	else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))