virtual destructors

gtsam/navigation/ImuFactor.h

@@ -106,6 +106,10 @@ public:
        preintMeasCov_(preintMeasCov) {
   }
 
+  /// Virtual destructor
+  virtual ~PreintegratedImuMeasurements() {
+  }
+
   /// print
   void print(const std::string& s = "Preintegrated Measurements:") const override;
 

gtsam/navigation/TangentPreintegration.h

@@ -42,7 +42,7 @@ class TangentPreintegration : public PreintegrationBase {
   }
 
 public:
-  /// @name Constructors
+  /// @name Constructors/destructors
   /// @{
 
   /**
@@ -53,6 +53,10 @@ public:
   TangentPreintegration(const boost::shared_ptr<Params>& p,
       const imuBias::ConstantBias& biasHat = imuBias::ConstantBias());
 
+  /// Virtual destructor
+  virtual ~TangentPreintegration() {
+  }
+
   /// @}
 
   /// @name Basic utilities