slideshow.c: Update comment (again)

src/slideshow.c

@@ -292,13 +292,14 @@ slideshow_change_image(winwidget winwid, int change)
    if (!success)
    {
       /* We get here if three files in a row could not be loaded.
-	  * However, it seems that this piece of code is never reached when feh
-	  * would otherwise fail; it's only executed in the aforementioned case,
-	  * causing slideshows to exit although there still are lots of working slides.
-	  *
-	  * This warning will remain here for now, in case someone finds circumstances
-	  * in which we actually need to exit feh here.
-	  */
+       * However, it seems that this piece of code is never reached when feh
+       * would otherwise fail; it's only executed in the aforementioned case,
+       * causing slideshows to exit although there still are lots of working slides.
+       *
+       * So far, there is one known case were we should exit here:
+       * When viewing a set of files, externally removing all of them and then resizing
+       * the window in feh, feh will print lots of imlib errors and eventually segfault.
+       */
       weprintf("No more slides in show?");
    }
    if (opt.slideshow_delay >= 0.0)