Merge topic 'std_string_ostream_passthrough' into master

c49b9c19 Pass std::strings through the OStreamWrapper.

Common/Core/vtkOStreamWrapper.cxx

@@ -57,6 +57,7 @@ VTKOSTREAM_OPERATOR(vtkObjectBase&);
 VTKOSTREAM_OPERATOR(const vtkLargeInteger&);
 VTKOSTREAM_OPERATOR(const vtkSmartPointerBase&);
 VTKOSTREAM_OPERATOR(const vtkStdString&);
+VTKOSTREAM_OPERATOR(const std::string&);
 VTKOSTREAM_OPERATOR(const char*);
 VTKOSTREAM_OPERATOR(void*);
 VTKOSTREAM_OPERATOR(char);

Common/Core/vtkOStreamWrapper.h

@@ -65,6 +65,7 @@ public:
   vtkOStreamWrapper& operator << (const vtkLargeInteger&);
   vtkOStreamWrapper& operator << (const vtkSmartPointerBase&);
   vtkOStreamWrapper& operator << (const vtkStdString&);
+  vtkOStreamWrapper& operator << (const std::string&);
   vtkOStreamWrapper& operator << (const char*);
   vtkOStreamWrapper& operator << (void*);
   vtkOStreamWrapper& operator << (char);