Further reduce "-fsyntax-only -Wuninitialized" time on sqlite3.c by another 2.5% using intelligent pruning of blocks during the final reporting pass.
Further reduce "-fsyntax-only -Wuninitialized" time on sqlite3.c by another 2.5% using intelligent pruning of blocks during the final reporting pass.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@168257 91177308-0d34-0410-b5e6-96231b3b80d8

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