Remove leading line feeds (or while spaces). Fixes...

Remove leading line feeds (or while spaces). Fixes "http://www.yle.fi/java/areena/dispatcher/193730.asx?bitrate=1000000" while previous commit fixed http://paste.videolan.org/1950 .

modules/demux/playlist/asx.c

@@ -589,6 +589,7 @@ static int Demux( demux_t *p_demux )
                     if( ( psz_parse = strcasestr( psz_parse, "\"" ) ) )
                     {
                         psz_backup = ++psz_parse;
+                        psz_backup = SkipBlanks(psz_backup, (unsigned)-1);
                         if( ( psz_parse = strcasestr( psz_parse, "\"" ) ) )
                         {
                             char *psz_tmp;