Reduce compiler warnings #705

Job	Run time
Autobahn test suite (ws, version-1-6)	17m 47s
linux-amd64 (Nim version-1-6)	8m 57s
Autobahn test suite (ws, version-2-0)	19m 56s
linux-amd64 (Nim version-2-0)	9m 26s
Autobahn test suite (ws, devel)	21m 4s
linux-amd64 (Nim devel)	9m 27s
Autobahn test suite (wsc, version-1-6)	21m 1s
linux-i386 (Nim version-1-6)	12m 13s
Autobahn test suite (wsc, version-2-0)	23m 37s
linux-i386 (Nim version-2-0)	10m 37s
Autobahn test suite (wsc, devel)	22m 18s
linux-i386 (Nim devel)	10m 48s
Autobahn test suite (wss, version-1-6)	18m 32s
macos-amd64 (Nim version-1-6)	9m 46s
Autobahn test suite (wss, version-2-0)	21m 5s
macos-amd64 (Nim version-2-0)	12m 52s
Autobahn test suite (wss, devel)	22m 38s
macos-amd64 (Nim devel)	13m 58s
Autobahn test suite (wssc, version-1-6)	36m 55s
windows-amd64 (Nim version-1-6)	11m 17s
Autobahn test suite (wssc, version-2-0)	41m 26s
windows-amd64 (Nim version-2-0)	12m 22s
Autobahn test suite (wssc, devel)	39m 53s
windows-amd64 (Nim devel)	12m 46s
Deplay Autobahn results	8m 57s
	7h 29m 38s

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