process.c: treat '=' only in the first word
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36048 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
process.c: treat '=' only in the first word
the first word does not contain '=', it is the command name and
environment assignments cannot be anymore.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36048 b2dd03c8-39d4-4d8f-98ff-823fe69b080e