complex.c: refactoring
complex.c (f_zero_p): return int rather than VALUE.
complex.c (rb_complex_mul): remove needless negate operations.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56772 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
complex.c: refactoring
complex.c (f_zero_p): return int rather than VALUE.
complex.c (rb_complex_mul): remove needless negate operations.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56772 b2dd03c8-39d4-4d8f-98ff-823fe69b080e