Ignore vlc_object_wait return value

We need to check vlc_object_alive() anyway, due to the intrinsic race
condition whereby the thread is killed before it's got the chance to
lock its object and call vlc_object_wait().

src/network/httpd.c

@@ -2453,7 +2453,7 @@ retry:
         {
             b_die = !vlc_object_alive( host );
             if( !b_die )
-                b_die = vlc_object_wait( host );
+                vlc_object_wait( host );
         }
         vlc_object_unlock( host );