Refs #11704 Add required includes

Code/Mantid/MantidQt/API/src/MantidQwtIMDWorkspaceData.cpp

@@ -8,6 +8,7 @@
 #include "MantidGeometry/MDGeometry/IMDDimension.h"
 #include "MantidGeometry/MDGeometry/MDTypes.h"
 #include <QStringBuilder>
+#include <boost/math/special_functions/fpclassify.hpp>
 
 using namespace Mantid::Kernel;
 using namespace Mantid::Geometry;

Code/Mantid/MantidQt/API/src/QwtWorkspaceBinData.cpp

@@ -2,6 +2,7 @@
 #include "MantidQtAPI/PlotAxis.h"
 
 #include <QStringBuilder>
+#include <boost/math/special_functions/fpclassify.hpp>
 
 /// Constructor
 QwtWorkspaceBinData::QwtWorkspaceBinData(const Mantid::API::MatrixWorkspace &workspace, int binIndex, const bool logScale)

Code/Mantid/MantidQt/API/src/QwtWorkspaceSpectrumData.cpp

@@ -2,6 +2,7 @@
 #include "MantidQtAPI/PlotAxis.h"
 
 #include <QStringBuilder>
+#include <boost/math/special_functions/fpclassify.hpp>
 
 /**
  * Construct a QwtWorkspaceSpectrumData object with a source workspace