[ruby-cvs:67738] ko1:r60557 (trunk): use `GET_EC()`.

[ko1 at ruby-lang.org]

ko1	2017-10-30 00:13:49 +0900 (Mon, 30 Oct 2017)

  New Revision: 60557

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60557

  Log:
    use `GET_EC()`.
    
    * eval.c (rb_block_given_p): use `GET_EC()` directly.
    
    * eval.c (rb_ensure): ditto.
    
    * eval.c (rb_errinfo): ditto.
    
    * eval.c (previous_frame): accepts `ec` instead of `th`.

  Modified files:
    trunk/eval.c