Add more index entries for large-file-warning-threshold.

 files.texi (Visiting): Add more index entries for
 large-file-warning-threshold.

doc/emacs/ChangeLog

+2010-07-31  Eli Zaretskii  <eliz@gnu.org>
+
+	* files.texi (Visiting): Add more index entries for
+	large-file-warning-threshold.
+
 2010-07-29  Jan Djärv  <jan.h.d@swipnet.se>
 
 	* frames.texi (Tool Bars): Add doc for tool-bar-position.

doc/emacs/files.texi

@@ -202,6 +202,8 @@ since you visited or saved it last.  If the file has changed, Emacs offers
 to reread it.
 
 @vindex large-file-warning-threshold
+@cindex file, warning when size is large
+@cindex size of file, warning when visiting
 @cindex maximum buffer size exceeded, error message
   If you try to visit a file larger than
 @code{large-file-warning-threshold} (the default is 10000000, which is