* complex.c (nucomp_canonicalization): renamed.

	* ext/math/complex.c: followed the above change.

	* rational.c (nurat_canonicalization): renamed.

	* ext/math/rational.c: followed the above change.

	* configure.in: defines a new macro.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@20874 b2dd03c8-39d4-4d8f-98ff-823fe69b080e