vm_method.c: fix method_removed

* vm_method.c: call method_removed hook on called class, not on
  prepending iclass.  [ruby-core:52207] [Bug #7843]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39235 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,7 +1,7 @@
 Thu Feb 14 10:30:41 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* vm_method.c: call method_removed hook on called class, not on
-	  prepending iclass.
+	  prepending iclass.  [ruby-core:52207] [Bug #7843]
 
 Thu Feb 14 10:05:57 2013  Eric Hodel  <drbrain@segment7.net>
 

test/ruby/test_module.rb

@@ -1397,7 +1397,7 @@ class TestModule < Test::Unit::TestCase
     c.singleton_class.class_eval do
       define_method(:method_removed) {|id| removed = id}
     end
-    assert_nothing_raised(NoMethodError, NameError) do
+    assert_nothing_raised(NoMethodError, NameError, '[Bug #7843]') do
       c.class_eval do
         remove_method(:foo)
       end