Fix get_version() type spec.
Fix get_version() type spec.

Change-Id: Ic20d78164d8087cb784dea8f241d7614f42b8032
Reviewed-on: http://review.couchbase.org/9178
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

nimishzynga/ns_server,nimishzynga/ns_server,vzasade/ns_server,ceejatec/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,t3rm1n4l/ns_server,membase/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,membase/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,nimishzynga/ns_server,membase/ns_server,mschoch/ns_server,ceejatec/ns_server,nimishzynga/ns_server,ceejatec/ns_server,vzasade/ns_server,ceejatec/ns_server,vzasade/ns_server,ceejatec/ns_server,pavel-blagodov/ns_server,mschoch/ns_server,daverigby/ns_server,daverigby/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,mschoch/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,mschoch/ns_server,nimishzynga/ns_server,membase/ns_server,pavel-blagodov/ns_server,daverigby/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,t3rm1n4l/ns_server