merge revision(s) r47860: [Backport #10350]

	* bignum.c (absint_numwords_generic): set an array element after
	  definition of a variable to fix compile error with older version
	  of fcc (Fujitsu C Compiler) 5.6 on Solaris 10 on Sparc.
	  [Bug #10350] [ruby-dev:48608]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@48303 b2dd03c8-39d4-4d8f-98ff-823fe69b080e