Do not warn about unsupported demux/access when aborting.

src/input/input.c

@@ -2480,12 +2480,15 @@ static int InputSourceInit( input_thread_t *p_input,
         /* Now try a real access */
         in->p_access = access_New( p_input, psz_access, psz_demux, psz_path );
         if( in->p_access == NULL )
+        {
+            if( vlc_object_alive( p_input ) )
             {
                 msg_Err( p_input, "open of `%s' failed: %s", psz_mrl,
                                                              msg_StackMsg() );
                 dialog_Fatal( p_input, _("Your input can't be opened"),
                               _("VLC is unable to open the MRL '%s'."
                                 " Check the log for details."), psz_mrl );
+            }
             goto error;
         }
 
@@ -2611,6 +2614,8 @@ static int InputSourceInit( input_thread_t *p_input,
         }
 
         if( in->p_demux == NULL )
+        {
+            if( vlc_object_alive( p_input ) )
             {
                 msg_Err( p_input, "no suitable demux module for `%s/%s://%s'",
                          psz_access, psz_demux, psz_path );
@@ -2618,6 +2623,7 @@ static int InputSourceInit( input_thread_t *p_input,
                               _("VLC can't recognize the input's format"),
                               _("The format of '%s' cannot be detected. "
                                 "Have a look at the log for details."), psz_mrl );
+            }
             goto error;
         }