compilation fix

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12053 6c8e4198-a580-4521-a02f-c9ae86df1db9
move canonical check of high part of page split access to another function to fix code duplication

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12054 6c8e4198-a580-4521-a02f-c9ae86df1db9