commit 59c5f36acfcbec4f6119996f7b80383bf86125d4 (HEAD, refs/remotes/origin/master)
Author: Eli Zaretskii <eliz@gnu.org>
Date:   Wed Oct 12 18:24:21 2016 +0300

    * lib-src/etags.c (invalidate_nodes): Remove a redundant nullp test.

diff --git a/lib-src/etags.c b/lib-src/etags.c
index 0479f8e..e5d76d4 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -2267,7 +2267,7 @@ invalidate_nodes (fdesc *badfdp, node **npp)
 	      free_tree (np);		  /* free it */
 
 	      /* Continue with rest of tree.  */
-	      np = np_parent ? np_parent->left : NULL;
+	      np = np_parent->left;
 	    }
 	}
       *npp = super_root.left;