From da4e51a6c2987ef03d5f618f9cc43c87a2992fa4 Mon Sep 17 00:00:00 2001
From: Juergen Spitzmueller <spitz@lyx.org>
Date: Mon, 21 May 2018 13:45:31 +0200
Subject: [PATCH] Fix wrong warning.

---
 src/TextClass.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/TextClass.cpp b/src/TextClass.cpp
index 4788fef7b1..f33dc18a88 100644
--- a/src/TextClass.cpp
+++ b/src/TextClass.cpp
@@ -1769,6 +1769,9 @@ DocumentClassPtr getDocumentClass(
 		}
 	}
 
+	if (cengine.empty())
+		return doc_class;
+
 	LyXCiteEngine * ce = theCiteEnginesList[cengine];
 	if (!ce) {
 		docstring const msg =