fix #1131, now treat int local vars like data within expressions
Merge branch 'develop' of https://github.com/stan-dev/stan into bugfix/issue-1131-int-locals-not-params
added missing semicolon in test model
Merge pull request #1170 from stan-dev/bugfix/issue-1131-int-locals-not-params

Fixes #1131. Bugfix/issue 1131 int locals not params