logic/track-logger: add virtual dtor to parent class

It's defined out-of-line so that vtable is emitted only once.

2 files changed, 3 insertions, 0 deletions

diff --git a/opentrack-logic/tracklogger.cpp b/opentrack-logic/tracklogger.cpp
index f007c2bc..c644df16 100644
--- a/opentrack-logic/tracklogger.cpp
+++ b/opentrack-logic/tracklogger.cpp
@@ -1,6 +1,8 @@
 #include "tracklogger.hpp"
 #include "tracker.h"
 
+TrackLogger::~TrackLogger() {}
+
 void TrackLoggerCSV::handle_first_col_sep()
 {
     if (!first_col)
diff --git a/opentrack-logic/tracklogger.hpp b/opentrack-logic/tracklogger.hpp
index 65128d48..b4fcefc3 100644
--- a/opentrack-logic/tracklogger.hpp
+++ b/opentrack-logic/tracklogger.hpp
@@ -17,6 +17,7 @@ public:
     virtual void write(const char *)
     {
     }
+    virtual ~TrackLogger();
 
     virtual void write(const double *, int n)
     {