HR integration review request: #224879 - Incorrect unused assignment warning

(Resending with correct subject.)

Description:
http://netbeans.org/bugzilla/show_bug.cgi?id=224879

An incorrect "unused assignment" warning is shown for a while loop
inside an enhanced for loop some cases (might possibly also affect
outcome of Introduce Method in cases where flow analysis is required).

Impact assessment: regression from 7.2.1

Risk assessment: low - the fix only alters enhanced for loop processing
in the flow analysis, and should not have affect outside processing of such
loops.

Reviewed by Dusan Balek. QA verification by Jirka Prox.

Changeset:
http://hg.netbeans.org/main-golden/rev/edcada9ec93d

Thanks for review,
      Jan