Fix lyx2lyx revertion for natbib.

We need to search for the \cite_engine line starting from the
beginning of the document header.

diff --git a/lib/lyx2lyx/lyx_2_1.py b/lib/lyx2lyx/lyx_2_1.py
index 470414336586d246b0471a5e9485ffca9c68b4a4..a93191169d99290501df209af409b44ecf1201c0 100644 (file)
--- a/lib/lyx2lyx/lyx_2_1.py
+++ b/lib/lyx2lyx/lyx_2_1.py
@@ -445,7 +445,7 @@ def revert_cite_engine_type(document):
         del document.header[i]
 
     # We are looking for the natbib citation engine
-    i = find_token(document.header, "\\cite_engine natbib", i)
+    i = find_token(document.header, "\\cite_engine natbib", 0)
     if i == -1:
         return
     document.header[i] = "\\cite_engine natbib_" + engine_type