lua: youtube seems to do some (more) double encoding

(cherry picked from commit 27e2bbff)
Signed-off-by: Ilkka Ollakka <ileoo@videolan.org>

share/lua/playlist/youtube.lua

@@ -68,6 +68,7 @@ function parse()
             if string.match( line, "<meta name=\"title\"" ) then
                 _,_,name = string.find( line, "content=\"(.-)\"" )
                 name = vlc.strings.resolve_xml_special_chars( name )
+                name = vlc.strings.resolve_xml_special_chars( name )
             end
             if string.match( line, "<meta name=\"description\"" ) then
                -- Don't ask me why they double encode ...