Make liveness_contextt::get_location() public

Author: jezhiggins

src/analyses/variable-sensitivity/liveness_context.h

@@ -64,6 +64,8 @@ class liveness_contextt : public write_location_contextt
   void output(std::ostream &out, const class ai_baset &ai, const namespacet &ns)
     const override;
 
+  locationt get_location() const;
+
 protected:
   CLONE
 
@@ -82,8 +84,6 @@ class liveness_contextt : public write_location_contextt
     const abstract_object_pointert &value,
     bool merging_write) const override;
 
-  locationt get_location() const;
-
 private:
   using liveness_context_ptrt = std::shared_ptr<const liveness_contextt>;