UBIFS: add more debugging messages for LPT

Also add debugging checks for LPT size and separate
out c->check_lpt_free from unrelated bitfields.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index 9ff2463..cd11b23 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -109,7 +109,8 @@
 	c->lpt_sz = (long long)c->pnode_cnt * c->pnode_sz;
 	c->lpt_sz += (long long)c->nnode_cnt * c->nnode_sz;
 	c->lpt_sz += c->ltab_sz;
-	c->lpt_sz += c->lsave_sz;
+	if (c->big_lpt)
+		c->lpt_sz += c->lsave_sz;
 
 	/* Add wastage */
 	sz = c->lpt_sz;