[analyzer] fixup the comment

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183450 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Ensure that pieces with invalid locations always get removed from the BugReport

The function in which we were doing it used to be conditionalized. Add a new unconditional
cleanup step.

This fixes PR16227 (radar://14073870) - a crash when generating html output for one of the test files.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183451 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Address Jordan’s code review for r183451

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183455 91177308-0d34-0410-b5e6-96231b3b80d8