add accessor for sys component to joint client context

Author: gfrolov

src/osvr/JointClientKit/JointClientContext.cpp

@@ -123,6 +123,10 @@ namespace client {
         return m_pathTree;
     }
 
+    common::SystemComponent *JointClientContext::m_getSystemComponent() {
+        return m_systemComponent;
+    }
+
     bool JointClientContext::m_connectCallbacksOnPath(std::string const &path) {
         /// Start by removing handler from interface tree and handler container
         /// for this path, if found. Ensures that if we early-out (fail to set

src/osvr/JointClientKit/JointClientContext.h

@@ -76,6 +76,8 @@ namespace client {
 
         virtual common::PathTree const &m_getPathTree() const;
 
+        virtual osvr::common::SystemComponent *m_getSystemComponent();
+
         /// @brief Given a path, remove any existing handler for that path, then
         /// attempt to fully resolve the path to its source and construct a
         /// handler for it.