[latexila] Synctex: document that it works only with PDF files

[Sébastien Wilmet <swilmet src gnome org>]

commit b3a6169e7d8b8eb4ef6399d56f4511a46859614f
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Jan 26 12:20:38 2017 +0100

    Synctex: document that it works only with PDF files

 src/liblatexila/latexila-synctex.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/liblatexila/latexila-synctex.c b/src/liblatexila/latexila-synctex.c
index 177621a..0135bf0 100644
--- a/src/liblatexila/latexila-synctex.c
+++ b/src/liblatexila/latexila-synctex.c
@@ -28,6 +28,9 @@
  * the forward search: source file -> PDF. And backward search: PDF -> source
  * file.
  *
+ * It works only with PDF files, it doesn't work with DVI or PS or other
+ * generated document formats.
+ *
  * D-Bus is used to communicate between LaTeXila and Evince. The implementation
  * uses the asynchronous gdbus generated functions.
  *