From ad705bd01ed5b993544042cd5d42db985235878b Mon Sep 17 00:00:00 2001
From: Abs62 <ottomann@yandex.ru>
Date: Mon, 19 Mar 2018 17:42:30 +0300
Subject: [PATCH] Fix isNameOf...() functions for case of string contains
 whitespaces only

---
 filetype.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/filetype.cc b/filetype.cc
index 9eaad6f6..40f36285 100644
--- a/filetype.cc
+++ b/filetype.cc
@@ -27,6 +27,9 @@ string simplifyString( string const & str )
   while( endPos && Utf8::isspace( str[ endPos - 1 ] ) )
     --endPos;
 
+  if( endPos <= beginPos )
+    return string();
+
   result.reserve( endPos - beginPos );
 
   while( beginPos < endPos )