Changed rb_ary_length to RARRAY_LEN
Changed rb_ary_length to RARRAY_LEN

abinashmeher999/symengine.rb,rajithv/symengine.rb,symengine/symengine.rb,abinashmeher999/symengine.rb,rajithv/symengine.rb,symengine/symengine.rb,abinashmeher999/symengine.rb,symengine/symengine.rb,rajithv/symengine.rb