new warnings in r58279

HeaderMap.cpp: In member function ‘clang::HMapBucket clang::HeaderMap::getBucket(unsigned int) const’:
HeaderMap.cpp:137: warning: ‘Result.clang::HMapBucket::Suffix’ may be used uninitialized in this function
HeaderMap.cpp:137: warning: ‘Result.clang::HMapBucket::Prefix’ may be used uninitialized in this function

GRExprEngine.cpp: In member function ‘void clang::GRExprEngine::VisitBinaryOperator(clang::BinaryOperator*, clang::ExplodedNode<clang::GRState>*, clang::ExplodedNodeSet<clang::GRState>&)’:
GRExprEngine.cpp:2182: warning: dereferencing type-punned pointer will break strict-aliasing rules
GRExprEngine.cpp:2184: warning: dereferencing type-punned pointer will break strict-aliasing rules

SVals.cpp: In member function ‘const clang::SymbolID* clang::SVal::symbol_begin() const’:
SVals.cpp:33: warning: dereferencing type-punned pointer will break strict-aliasing rules
SVals.cpp:35: warning: dereferencing type-punned pointer will break strict-aliasing rules

Fixed: http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20081027/008636.html

Fixed: http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20081027/008637.html