Memory leak plugging

du5/a_station.c

@@ -31,17 +31,20 @@ void add_target_capacity(struct station* station,const char* target, int capacit
     struct car* ptr = *station->tracks;
    int count = 0;
    int res = select_track(station, target);
-   while(count != res && ptr){
+   while(ptr && ptr->next){
+    if(count == res){
+        break;
+    }
 
     ptr = ptr->next;
     count++;
 
    }
-   if(!ptr->next){
-    ptr = (struct car*)calloc(capacity, sizeof(struct car));
-    ptr->capacity = capacity;
-    strcpy(ptr->value, target);
-    ptr->next = NULL;
+   if(count < res){
+    struct car* next = (struct car*)calloc(10, sizeof(struct car));
+    strcpy(next->value, target);
+    next->capacity = capacity;
+    ptr->next = next;
     return;
    }
    ptr->capacity += capacity;