Fixed adding message to data list before receiving messages

src/node.c

@@ -229,7 +229,13 @@ int add_data(unsigned char len, int64_t id, int16_t seqno, char *data) {
         // If the data list has never been used, or is empty ( same thing )
         if (data_list == NULL) {
             data_list = (list*) malloc(sizeof(struct list));
-        }
+
+            list *tmp = data_list;
+            // We create the next node of the linked list.
+            tmp->data = (void *) message;
+            tmp->next = NULL;
+            
+        } else {
             // we move until the last element of the dala_list,
             // and add or data there.
             // We use a temporary address to avoid writing to the static list.
@@ -245,7 +251,7 @@ int add_data(unsigned char len, int64_t id, int16_t seqno, char *data) {
 
             // Adding the message to the list.
             tmp->next = (void *) new_node;
-
+        }
         return 1;
     } else {
         // Copy data