es_out: Put a msg_Dbg in input_EsOutDelete.

src/input/es_out.c

@@ -270,6 +270,8 @@ void input_EsOutDelete( es_out_t *out )
     es_out_sys_t *p_sys = out->p_sys;
     int i;
 
+    msg_Dbg( out, "deleting es out" );
+
     for( i = 0; i < p_sys->i_es; i++ )
     {
         if( p_sys->es[i]->p_dec )