to inches function

git-svn-id: https://plugins.svn.wordpress.org/wp-spreadplugin/trunk@907493 b8457f37-d9ea-0310-8a92-e5e31aec5664
b size inch missing

git-svn-id: https://plugins.svn.wordpress.org/wp-spreadplugin/trunk@907494 b8457f37-d9ea-0310-8a92-e5e31aec5664