Add bailout checks to Message::Get{Start,End}Column()

Also add an initial ON_BAILOUT() check to these two 'bailout enabled'
accessors.

(The need for these was encountered via http://crbug.com/393273)

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/402173003

Patch from Sigbjorn Finne <sof@opera.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22553 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Avoid redundent redefinition of __STDC_FORMAT_MACROS when building with clang

R=jochen@chromium.org, paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/404333003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22554 ce2b1a6d-e550-0410-aec6-3dcde31c8c00