Fix file parsing when file in zip archive is less than 2 bytes. Less … #287

Job	Run time
Build server image	1m 16s
Build client image	1m 9s
Build httpd+cgi image	19s
Run test scripts (cert_handling.sh)	2m 27s
Run test scripts (cfengine.sh)	2m 12s
Run test scripts (change_ca.sh)	1m 48s
Run test scripts (client_timing.sh)	1m 50s
Run test scripts (clones.sh)	1m 51s
Run test scripts (powershell.sh)	2m 10s
Publish server image	0s
Tag and release	0s
Publish httpd+cgi image	0s
	15m 2s

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