input: preparsing not only for files

It's safe since preparser won't be called for network files if
META_REQUEST_OPTION_SCOPE_NETWORK option is not set.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

src/input/input.c

@@ -2225,11 +2225,8 @@ static int InputSourceInit( input_thread_t *p_input,
     }
     else
     {
-        /* Preparsing is only for file:// */
         if( *psz_demux )
             goto error;
-        if( strcmp( psz_access, "file" ) )
-            goto error;
         msg_Dbg( p_input, "trying to pre-parse %s",  psz_path );
     }