- build: Fix no pch build (related to r9674)

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9675 2a5c6006-c6dd-42ca-98ab-0921f2732cef
- compiler: Use enum instead of hard coded integer values

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9676 2a5c6006-c6dd-42ca-98ab-0921f2732cef