It is possible that there are calls to getPos before reset
Found thanks to PDF provided by Joel Voss of Leviathan Security Group

Many streams (notably JBIG2Stream) expect wrapped streams to return correct
values for getPos(), i.e. increments by 1 when readChar() called, etc.
Fixes bug #19706.

See bug #21270

I am not sure this is the correct fix, but fixes crash on files of bugs 13972, 16092 and 17523 and they seem to work ok

Still missing to answer
Marco Pesenti Gritti
	Catalog.cc
	Outline.cc
	Outline.h

Kjartan Maraas
	HtmlOutputDev.cc

Timothy Lee
	ImageOutputDev.h
	ImageOutputDev.cc

Carl Worth
	CairoOutputDev.cc

Ed Catmur
	GfxFont.cc
	GlobalParams.cc
	TextOutputDev.cc
	TextOutputDev.h
	UnicodeTypeTable.cc
	UnicodeTypeTable.h

Add more correct copyright statements on fofi, goo, poppler and util directories to be more compliant with GPL that requires such modification statements to be present. Meanwhile i did that, i did qt and qt4 dirs too, glib is missing if someone wants to fix it, but it's not crucial as it's not a fork of some other GPL software

Testing more than welcome

        * goo/Makefile.am:
        * poppler/DCTStream.h:
        * poppler/Decrypt.cc:
        * poppler/Decrypt.h:
        * poppler/FlateStream.h:
        * poppler/GlobalParams.cc:
        * poppler/GlobalParams.h:
        * poppler/Makefile.am:
        * poppler/PDFDoc.cc:
        * poppler/PDFDoc.h:
        * poppler/Parser.cc:
        * poppler/Parser.h:
        * poppler/Stream.cc:
        * poppler/Stream.h:
        * poppler/XRef.cc:
        * poppler/XRef.h:
        * poppler/poppler-config.h.in:

        Merge security plugins support from xpdf 3.01

martink's work (7-xpdf-3.01-goo-improvements.patch), with some tweaking
by me.