Fixed issue where default page orientation was not being set when we had no entry in wp_options for it. This resulted in an error when attempting to generate a PDF (TCPDF ERROR: Incorrect unit: p). We now explicitly set this value to P (portrait) if no setting has been stored in the database.

git-svn-id: https://plugins.svn.wordpress.org/wp-post-to-pdf-enhanced/trunk@943231 b8457f37-d9ea-0310-8a92-e5e31aec5664