Fixed linking issue of static members in RobotSensorMemory.h

source/RobotAPI/components/armem/server/RobotSensorMemory/RobotSensorMemory.h

@@ -137,7 +137,7 @@ namespace armarx
         };
 
         // params
-        static const int ROBOT_UNIT_MAXIMUM_FREQUENCY = 100;
+        static constexpr int ROBOT_UNIT_MAXIMUM_FREQUENCY = 100;
         int robotUnitPollFrequency = 50;
         std::string robotUnitSensorPrefix = "sens.*";
         unsigned int robotUnitMemoryBatchSize = 50;
@@ -158,7 +158,7 @@ namespace armarx
         };
 
         // params
-        static const int ROBOT_STATE_COMPONENT_MAXIMUM_FREQUENCY = 100;
+        static constexpr int ROBOT_STATE_COMPONENT_MAXIMUM_FREQUENCY = 100;
         int robotStateComponentPollFrequency = 50;
         unsigned int robotStateComponentMemoryBatchSize = 50;