Reduce compiler warnings #709

Job	Run time
Autobahn test suite (ws, version-1-6)	17m 55s
linux-amd64 (Nim version-1-6)	8m 48s
Autobahn test suite (ws, version-2-0)	20m 6s
linux-amd64 (Nim version-2-0)	9m 20s
Autobahn test suite (ws, devel)	21m 15s
linux-amd64 (Nim devel)	9m 41s
Autobahn test suite (wsc, version-1-6)	19m 51s
linux-i386 (Nim version-1-6)	11m 40s
Autobahn test suite (wsc, version-2-0)	21m 28s
linux-i386 (Nim version-2-0)	11m 22s
Autobahn test suite (wsc, devel)	22m 9s
linux-i386 (Nim devel)	10m 38s
Autobahn test suite (wss, version-1-6)	21m 53s
macos-amd64 (Nim version-1-6)	10m 21s
Autobahn test suite (wss, version-2-0)	23m 36s
macos-amd64 (Nim version-2-0)	12m 36s
Autobahn test suite (wss, devel)	23m 45s
macos-amd64 (Nim devel)	13m 4s
Autobahn test suite (wssc, version-1-6)	35m 51s
windows-amd64 (Nim version-1-6)	11m 21s
Autobahn test suite (wssc, version-2-0)	41m 35s
windows-amd64 (Nim version-2-0)	12m 14s
Autobahn test suite (wssc, devel)	39m 55s
windows-amd64 (Nim devel)	13m 23s
Deplay Autobahn results	1m 27s
	7h 25m 14s

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