Add keyword override

include/gnss/processor/processor_gnss_single_diff.h

@@ -70,13 +70,13 @@ class ProcessorGnssSingleDiff : public ProcessorBase
         *
         * Returns true if the key frame should be stored
         */
-        virtual bool storeKeyFrame(FrameBasePtr);
+        virtual bool storeKeyFrame(FrameBasePtr) override;
 
         /** \brief store capture
         *
         * Returns true if the capture should be stored
         */
-        virtual bool storeCapture(CaptureBasePtr);
+        virtual bool storeCapture(CaptureBasePtr) override;
 
         /** \brief trigger in capture
          *