ticket:7912: commit from review comments (thx)

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@34416 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9051: add an additional check for CHECK_LOCALTIME_LINK

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@34421 251d0590-4201-4cf1-90de-194747b24ca1
ticket:7912: more review comments


git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@34428 251d0590-4201-4cf1-90de-194747b24ca1