subsdec: check UTF-8 autodetection if encoding is not known in ES format

This enables to show UTF-8 subtitles even though subsdec-encoding is set to
a non-UTF-8 value.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

modules/codec/subsdec.c

@@ -262,6 +262,7 @@ static int OpenDecoder( vlc_object_t *p_this )
                  encoding);
     }
     else
+    {
         /* Second, try configured encoding */
         if ((var = var_InheritString (p_dec, "subsdec-encoding")) != NULL)
         {
@@ -277,7 +278,7 @@ static int OpenDecoder( vlc_object_t *p_this )
                 encoding = var;
         }
         else
-    /* Third, try "local" encoding with optional UTF-8 autodetection */
+        /* Third, try "local" encoding */
         {
         /* xgettext:
            The Windows ANSI code page most commonly used for this language.
@@ -291,6 +292,9 @@ static int OpenDecoder( vlc_object_t *p_this )
            the VideoLAN translators mailing list. */
             encoding = vlc_pgettext("GetACP", "CP1252");
             msg_Dbg (p_dec, "trying default character encoding: %s", encoding);
+        }
+
+        /* Check UTF-8 autodetection */
         if (var_InheritBool (p_dec, "subsdec-autodetect-utf8"))
         {
             msg_Dbg (p_dec, "using automatic UTF-8 detection");