[ruby-cvs:57455] nobu:r50307 (trunk): vm_backtrace.c: use rb_id2str

[nobu at ruby-lang.org]

nobu	2015-04-14 12:33:00 +0900 (Tue, 14 Apr 2015)

  New Revision: 50307

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=50307

  Log:
    vm_backtrace.c: use rb_id2str
    
    * vm_backtrace.c (location_base_label): convert ID to string
      directly, and the return value is frozen.

  Modified files:
    trunk/vm_backtrace.c