thread_sync.c: remove unnecessary casts for queue_sleep

"Qfalse" and "(VALUE)0" are equivalent, and do not matter
for an ignored argument, either.

Additionally, there's no reason to cast the pointer to
rb_thread_sleep_deadly when we already have a queue_sleep
wrapper.

* thread_sync.c (queue_do_pop): avoid cast with Qfalse
  (rb_szqueue_push): ditto, use queue_sleep wrapper

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Jan  2 21:07:55 2016  Eric Wong  <e@80x24.org>
+
+	* thread_sync.c (queue_do_pop): avoid cast with Qfalse
+	  (rb_szqueue_push): ditto, use queue_sleep wrapper
+
 Sat Jan  2 16:16:14 2016  Masatoshi SEKI  <m_seki@mva.biglobe.ne.jp>
 
 	* lib/erb.rb: Allow ERB subclass to add token easily.

thread_sync.c

@@ -786,7 +786,7 @@ queue_do_pop(VALUE self, int should_block)
 	    assert(queue_closed_p(self) == 0);
 
 	    rb_ary_push(args.waiting, args.th);
-	    rb_ensure(queue_sleep, (VALUE)0, queue_delete_from_waiting, (VALUE)&args);
+	    rb_ensure(queue_sleep, Qfalse, queue_delete_from_waiting, (VALUE)&args);
 	}
     }
 
@@ -1012,7 +1012,7 @@ rb_szqueue_push(int argc, VALUE *argv, VALUE self)
 	}
 	else {
 	    rb_ary_push(args.waiting, args.th);
-	    rb_ensure((VALUE (*)())rb_thread_sleep_deadly, (VALUE)0, queue_delete_from_waiting, (VALUE)&args);
+	    rb_ensure(queue_sleep, Qfalse, queue_delete_from_waiting, (VALUE)&args);
 	}
     }