Fix up reading of saved log files
Fix up reading of saved log files

Make sure we compensate for sizeof(int) and the stuff we have already
read.

Fixes: #848

mrhmouse/Varnish-Cache,chrismoulton/Varnish-Cache,alarky/varnish-cache-doc-ja,franciscovg/Varnish-Cache,drwilco/varnish-cache-drwilco,gauthier-delacroix/Varnish-Cache,gauthier-delacroix/Varnish-Cache,ajasty-cavium/Varnish-Cache,varnish/Varnish-Cache,drwilco/varnish-cache-drwilco,varnish/Varnish-Cache,franciscovg/Varnish-Cache,gquintard/Varnish-Cache,franciscovg/Varnish-Cache,gauthier-delacroix/Varnish-Cache,1HLtd/Varnish-Cache,chrismoulton/Varnish-Cache,1HLtd/Varnish-Cache,alarky/varnish-cache-doc-ja,zhoualbeart/Varnish-Cache,drwilco/varnish-cache-drwilco,feld/Varnish-Cache,mrhmouse/Varnish-Cache,varnish/Varnish-Cache,mrhmouse/Varnish-Cache,feld/Varnish-Cache,franciscovg/Varnish-Cache,alarky/varnish-cache-doc-ja,ajasty-cavium/Varnish-Cache,chrismoulton/Varnish-Cache,zhoualbeart/Varnish-Cache,ajasty-cavium/Varnish-Cache,zhoualbeart/Varnish-Cache,varnish/Varnish-Cache,alarky/varnish-cache-doc-ja,gquintard/Varnish-Cache,gauthier-delacroix/Varnish-Cache,franciscovg/Varnish-Cache,mrhmouse/Varnish-Cache,ajasty-cavium/Varnish-Cache,gauthier-delacroix/Varnish-Cache,varnish/Varnish-Cache,mrhmouse/Varnish-Cache,feld/Varnish-Cache,ambernetas/varnish-cache,chrismoulton/Varnish-Cache,feld/Varnish-Cache,zhoualbeart/Varnish-Cache,gquintard/Varnish-Cache,ajasty-cavium/Varnish-Cache,1HLtd/Varnish-Cache,1HLtd/Varnish-Cache,alarky/varnish-cache-doc-ja,gquintard/Varnish-Cache,ambernetas/varnish-cache,feld/Varnish-Cache,ambernetas/varnish-cache,chrismoulton/Varnish-Cache,zhoualbeart/Varnish-Cache