Resolves: #i124555# restore stream position after Seek to end of stream

(cherry picked from commit 61efddf5ab8cd318e022ca1ac817ba0879a55e23)

Conflicts:
	vcl/source/gdi/dibtools.cxx

(cherry picked from commit cc1a7748c867716966b6a38e75f89df5d92ee104)

Conflicts:
	vcl/source/gdi/dibtools.cxx

Change-Id: Ie6c0aeab5988b68954a0bdd460317ac9539d8a5f