Fix invalid test extension.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33982 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/-test-/path_to_class/path_to_class.c

@@ -1,9 +1,15 @@
 #include "ruby.h"
 
+static VALUE
+path_to_class(VALUE klass, VALUE path)
+{
+    return rb_path_to_class(path);
+}
+
 void
 Init_path_to_class(void)
 {
     VALUE klass = rb_path2class("Test_PathToClass");
 
-    rb_define_singleton_method(klass, "path_to_class", rb_path_to_class, 1);
+    rb_define_singleton_method(klass, "path_to_class", path_to_class, 1);
 }