UBIFS: fix budgeting calculations

The 'ubifs_release_dirty_inode_budget()' was buggy and incorrectly
freed the budget, which led to not freeing all dirty data budget.
This patch fixes that.

Also, this patch fixes ubifs_mkdir() which passed 1 in dirty_ino_d,
which makes no sense. Well, it is harmless though.

Also, add few more useful assertions. And improve few debugging
messages.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index e90374b..a79e850 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -727,8 +727,7 @@
 	struct ubifs_inode *dir_ui = ubifs_inode(dir);
 	struct ubifs_info *c = dir->i_sb->s_fs_info;
 	int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
-	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
-					.dirtied_ino_d = 1 };
+	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
 
 	/*
 	 * Budget request settings: new inode, new direntry and changing parent