mjit_worker.c: don't compile more than max_cache_size

Prior to this commit, max_cache_size + 1 methods could be active.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65174 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

mjit_worker.c

@@ -1187,7 +1187,7 @@ mjit_worker(void)
 
         /* wait until unit is available */
         CRITICAL_SECTION_START(3, "in worker dequeue");
-        while ((unit_queue.head == NULL || active_units.length > mjit_opts.max_cache_size) && !stop_worker_p) {
+        while ((unit_queue.head == NULL || active_units.length >= mjit_opts.max_cache_size) && !stop_worker_p) {
             rb_native_cond_wait(&mjit_worker_wakeup, &mjit_engine_mutex);
             verbose(3, "Getting wakeup from client");
         }