--- gexiv2/gexiv2-stream-io.h~	2017-05-07 19:14:31.243531627 +0000

+++ gexiv2/gexiv2-stream-io.h	2017-05-07 19:20:39.344439242 +0000

@@ -39,7 +39,7 @@

 	virtual Exiv2::byte* mmap (bool isWriteable = false);

 	virtual int munmap ();

 	virtual long tell () const;

-	virtual long size () const;

+	virtual size_t size () const;

 	virtual bool isopen () const;

 	virtual int error () const;

 	virtual bool eof () const;

--- gexiv2/gexiv2-stream-io.cpp~	2017-05-07 19:12:57.090555257 +0000

+++ gexiv2/gexiv2-stream-io.cpp	2017-05-07 19:22:41.042408694 +0000

@@ -142,7 +142,7 @@

     return cb->Position (cb->handle);

 }

-long StreamIo::size () const {

+size_t StreamIo::size () const {

     return cb->Length (cb->handle);

 }