merge revision(s) r45015: [Backport #9657]

	* ext/bigdecimal/bigdecimal.c (BigDecimal_initialize): Insert GC guard.

	* ext/bigdecimal/bigdecimal.c (BigDecimal_global_new): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45815 b2dd03c8-39d4-4d8f-98ff-823fe69b080e