fix tiff issue on windows

git-svn-id: http://tesseract-ocr.googlecode.com/svn/trunk@1111 d0cd1f9f-072b-0410-8dd7-cf729c803f20
fix Issue 1223: TessPolyBlockType enum is outdated in C-API

git-svn-id: http://tesseract-ocr.googlecode.com/svn/trunk@1112 d0cd1f9f-072b-0410-8dd7-cf729c803f20