edje/multisense: free multisense output on shutdown

this comment has now been addressed

Reviewed-by: Marcel Hollerbach <mail@marcel-hollerbach.de>
Differential Revision: https://phab.enlightenment.org/D11532

src/lib/edje/edje_multisense.c

@@ -354,8 +354,7 @@ _edje_multisense_shutdown(void)
      }
    if (out)
      {
-        // XXX: this causes an abort inside of pa!!!!!
-        //efl_unref(out);
+        efl_unref(out);
         out = NULL;
         outs = 0;
      }