* dir.c (glob_helper): use #ifdef instead of #if.
  gcc's -Wundef option shows warning for undefined macro.
* numeric.c (flo_is_finite_p): ditto.
* vm_dump.c (rb_vmdebug_thread_dump_state): ditto.
* vm_core.h: define VM_DEBUG_VERIFY_METHOD_CACHE to 0.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47382 b2dd03c8-39d4-4d8f-98ff-823fe69b080e