rtabmapviz: automatically read parameters from ros param server when receiving a map (fixing occupancy grid cell size not correctly set if rtabmapviz is started before rtabmap node, without having to open Preferences dialog and click apply to refresh the gui parameters)

src/GuiWrapper.cpp

@@ -235,6 +235,12 @@ void GuiWrapper::goalReachedCallback(
 
 void GuiWrapper::processRequestedMap(const rtabmap_ros::MapData & map)
 {
+	// Make sure parameters are loaded
+	if(((PreferencesDialogROS*)prefDialog_)->hasAllParameters())
+	{
+		QMetaObject::invokeMethod(((PreferencesDialogROS*)prefDialog_), "readRtabmapNodeParameters");
+	}
+
 	std::map<int, Signature> signatures;
 	std::map<int, Transform> poses;
 	std::multimap<int, rtabmap::Link> constraints;