viewer: type accuracy related to the WView::locked flag. #147

Job	Run time
call-build-fedora / build-fedora	1m 50s
call-build-macos / build-macos	1m 31s
call-build-alpine / build-alpine	2m 9s
call-build-freebsd / build-freebsd	3m 22s
call-build-solaris / build-solaris	5m 47s
call-build-ubuntu / build-ubuntu	4m 16s
	18m 55s

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