[LyX/master] Typo

[Kornel Benko]

commit 270df242468ce31fb2313ad0d239e5973dbecc4f
Author: Kornel Benko <kor...@lyx.org>
Date:   Mon Nov 23 13:41:29 2015 +0100

    Typo

diff --git a/development/checkurls/search_url.pl 
b/development/checkurls/search_url.pl
index 836a6ac..3f6bf72 100755
--- a/development/checkurls/search_url.pl
+++ b/development/checkurls/search_url.pl
@@ -166,7 +166,7 @@ if (%URLS) {
 
 print "\n$errorcount URL-tests failed out of $URLScount\n\n";
 if (defined($summaryFile)) {
-  close(DFO);
+  close(SFO);
 }
 exit($errorcount);