row0umod.c Partial fix to concurrent drop table and rollback by other user of rows in that table

row0uins.c	Partial fix to concurrent drop table and rollback by other user of rows in that table

innobase/row/row0uins.c

@@ -290,6 +290,7 @@ row_undo_ins(
 	}
 
 	if (!found) {
+	        trx_undo_rec_release(node->trx, node->undo_no);
 		return(DB_SUCCESS);
 	}
 

innobase/row/row0umod.c

@@ -589,6 +589,7 @@ row_undo_mod(
 		/* It is already undone, or will be undone by another query
 		thread, or table was dropped */
 	
+	        trx_undo_rec_release(node->trx, node->undo_no);
 		node->state = UNDO_NODE_FETCH_NEXT;
 
 		return(DB_SUCCESS);