CHG: the properties "options" and "tables" of a DELETE statement can be false, so we have to check that first to prevent warning messages.

git-svn-id: https://php-sql-parser.googlecode.com/svn/trunk@1338 44dcfd11-89b7-3d55-2063-5c365055f77f
Merge branch 'svnsync'

CHG: the properties "options" and "tables" of a DELETE statement can be false, so we have to check that first to prevent warning messages.