merge revision(s) 43775:

* util.c (ruby_strtod): ignore too long fraction part, which does not
  affect the result.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@43776 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 43780:

* util.c (ruby_strtod): BigMath requires more precision.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@43782 b2dd03c8-39d4-4d8f-98ff-823fe69b080e