Infinite loop with PDFFileReader when file is empty

[jerome-nexedi]

Reproducible with:

import StringIO, PyPDF2

PyPDF2.PdfFileReader(StringIO.StringIO())

[mstamy2]

The infinite loop bug occurs in the ReadNextEndLine() method. We'll include a fix in the next patch - would it be acceptable to just throw an exception?

[mstamy2]

Added the fix for infinite loop caused by empty file just now - however I recently noticed that a StringIO object with random characters with cause an infinite loop as well instead of throwing an exception. We should be able to fix this easily.

[MartinThoma]

This was solved pre 1.20, so I'll ignore it. I hope nobody still uses such an old version