fixed VALUE_TO_CVSCALAR in cvscalar.h to allow double values
fixed VALUE_TO_CVSCALAR in cvscalar.h to allow double values

fixed the following problem
[#27088] VALUE_TO_CVSCALAR wont allow float or double value
http://rubyforge.org/tracker/index.php?func=detail&aid=27088&group_id=1066&atid=4198

ryanfb/ruby-opencv,ryanfb/ruby-opencv,bonanza-market/ruby-opencv,bonanza-market/ruby-opencv,ser1zw/ruby-opencv,ryanfb/ruby-opencv,bonanza-market/ruby-opencv