va:display: Don't close an fd with negative value

Cannot pass negative parameter to close() and thus no need to apply
close() when fd < 0.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1131>

subprojects/gst-plugins-bad/gst-libs/gst/va/gstvadisplay_drm.c

@@ -140,7 +140,6 @@ gst_va_display_drm_create_va_display (GstVaDisplay * display)
   if (fd < 0) {
     GST_WARNING_OBJECT (self, "Failed to open %s: %s", self->path,
         g_strerror (saved_errno));
-    close (fd);
     return 0;
   }
 #if HAVE_LIBDRM