[PATCH] [analyzer][Bugfix/improvement] Fix for PR16833

[Aleksei Sidorin]

Remove debug output; fix handling of Unknown values.

http://reviews.llvm.org/D5102

Files:
  include/clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h
  include/clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h
  lib/StaticAnalyzer/Core/CoreEngine.cpp
  lib/StaticAnalyzer/Core/ExprEngine.cpp
  lib/StaticAnalyzer/Core/RangeConstraintManager.cpp
  lib/StaticAnalyzer/Core/SimpleConstraintManager.cpp
  lib/StaticAnalyzer/Core/SimpleConstraintManager.h
  test/Analysis/misc-ps.c
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