[Reviewed by Sung.]
[Reviewed by Sung.]

Don't print the message saying that we're using guard pages for stack
overflow detection unless QT_INFO is set.


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@21329 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

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