[LyX/master] Minor comment.

[Pavel Sanda]

commit 2a8c8b6345ce7c3abd307c2d449380a1cac4b6e8
Author: Pavel Sanda <sa...@lyx.org>
Date:   Wed Aug 7 17:13:18 2019 +0200

    Minor comment.
    
    Offshoot of bf99ece7366ad.
    https://mailman.ntg.nl/pipermail/ntg-pdftex/2019-August/004306.html
---
 src/LaTeX.cpp |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/LaTeX.cpp b/src/LaTeX.cpp
index cae5967..e68e07c 100644
--- a/src/LaTeX.cpp
+++ b/src/LaTeX.cpp
@@ -774,6 +774,9 @@ int LaTeX::scanLogFile(TeXErrors & terr)
                //Handles both "LaTeX Warning:" & "Package natbib Warning:"
                //Various handlers for missing citations below won't catch the 
problem if citation
                //key is long (>~25chars), because pdflatex splits output at 
line length 80.
+               //TODO: TL 2020 engines will contain new commandline switch 
--cnf-line which we  
+               //can use to set max_print_line variable for appropriate length 
and detect all
+               //errors correctly.
                if (contains(token, "There were undefined citations."))
                        retval |= UNDEF_CIT;