c++20 compile fix

Author: uwewoessner

src/OpenCOVER/plugins/covise/COVISE/coVRDistributionManager.cpp

@@ -468,7 +468,7 @@ int opencover::coVRDistributionManager::RenderNode::getSlaveIndex() const
     return this->slaveIndex;
 }
 
-bool opencover::coVRDistributionManager::RenderNode::operator==(const RenderNode &other)
+bool opencover::coVRDistributionManager::RenderNode::operator==(const RenderNode &other) const
 {
     return this->nodename == other.nodename;
 }

src/OpenCOVER/plugins/covise/COVISE/coVRDistributionManager.h

@@ -52,7 +52,7 @@ class coVRDistributionManager
 
         void applyScreens();
 
-        bool operator==(const RenderNode &);
+        bool operator==(const RenderNode &) const;
 
     private:
         void setNodename(const std::string &name);

src/OpenCOVER/plugins/hlrs/JAKA/JAKAPlugin.h

@@ -114,7 +114,7 @@ class Pose : public CartesianPose
         result.rpy.rz = rpy.rz - p.rpy.rz;
         return result;
     }
-    bool operator==(const Pose& p)
+    bool operator==(const Pose& p) const
     {
         if (tran.x == p.tran.x && tran.y == p.tran.y && tran.z == p.tran.z && rpy.rx == p.rpy.rx && rpy.ry == p.rpy.ry && rpy.rz == p.rpy.rz)
             return true;