PDFBOX-1811: don't fail, but put a warning if the parser is lenient and  object doesn't end with "endobj" but with the start of a new " obj"

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/branches/1.8@1570842 13f79535-47bb-0310-9956-ffa450edef68