[PATCH] Suppress an annoying "unused variable" warning caused by bug 17897.

[Rui Ueyama]

Hi rafael.espindola,

Clang says that "flow" is unused when building LLD. This patch suppresses it.

http://llvm-reviews.chandlerc.com/D2573

Files:
  include/llvm/Support/YAMLTraits.h

Index: include/llvm/Support/YAMLTraits.h
===================================================================
--- include/llvm/Support/YAMLTraits.h
+++ include/llvm/Support/YAMLTraits.h
@@ -1123,6 +1123,7 @@
         return seq.size();                                                  \
       }                                                                     \
       static _type& element(IO &io, std::vector<_type> &seq, size_t index) {\
+        (void)flow;                                                         \
         if ( index >= seq.size() )                                          \
           seq.resize(index+1);                                              \
         return seq[index];                                                  \
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