EventDefinitionM26: mark fileReader also as const in get_next_event_from_det for good practice

src/modules/EventDefinitionM26/EventDefinitionM26.cpp

@@ -83,7 +83,7 @@ void EventDefinitionM26::initialize() {
     }
 }
 
-unsigned EventDefinitionM26::get_next_event_with_det(eudaq::FileReaderUP& filereader,
+unsigned EventDefinitionM26::get_next_event_with_det(const eudaq::FileReaderUP& filereader,
                                                      const std::string& det,
                                                      long double& begin,
                                                      long double& end) {

src/modules/EventDefinitionM26/EventDefinitionM26.h

@@ -82,7 +82,7 @@ namespace corryvreckan {
          * @param end: timestamp of end of event
          * @return
          */
-        unsigned get_next_event_with_det(eudaq::FileReaderUP& filereader,
+        unsigned get_next_event_with_det(const eudaq::FileReaderUP& filereader,
                                          const std::string& det,
                                          long double& begin,
                                          long double& end);