Fixed misuse of &

src/ibea/ibea.cpp

@@ -52,7 +52,7 @@ void ibea(void* evaluate,
   }
 }
 
-void random_init(&Population pop, coco_random_state_t *random_generator){
+void random_init(Population & pop, coco_random_state_t *random_generator){
   for (int i=0; i < pop.getSize(); i++){
     for (int j=0; j < pop.getDim(); j++) {
       range = upper_bounds[j] - lower_bounds[j];