cosmetic: fixed some typers

git-svn-id: http://sphinxsearch.googlecode.com/svn/trunk@4089 8b96e2b9-35c5-2c16-bc47-5122d61876d4
cosmetic: fixed typres in models

git-svn-id: http://sphinxsearch.googlecode.com/svn/trunk@4090 8b96e2b9-35c5-2c16-bc47-5122d61876d4