1.2dev: Refactor `try`/`except` blocks
1.2dev: Refactor `try`/`except` blocks

* Move code that shouldn't raise exception out of `try` block
* Replace `try`/`except` with `as_int`


git-svn-id: 0d96b0c1a6983ccc08b3732614f4d6bfcf9cbb42@14866 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac