fix for msvc linker, re #13140

MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Tomography/StackOfImagesDirs.h

@@ -44,7 +44,7 @@ public:
   bool isValid() const { return m_valid; }
 
   // human readable description of the expected structure of directories
-  std::string description() const { return g_descr; }
+  std::string description() const;
 
   // string that describes the status/error message about this directory
   std::string status() const;

MantidQt/CustomInterfaces/src/Tomography/StackOfImagesDirs.cpp

@@ -25,6 +25,8 @@ StackOfImagesDirs::StackOfImagesDirs(const std::string &path)
   findStackDirs(path);
 }
 
+std::string StackOfImagesDirs::description() const { return g_descr; }
+
 std::string StackOfImagesDirs::status() const {
   if (m_valid)
     return "Stack of images is correct";