bullets again

I havetaken time to change over from using an array of bullets to a linked list of bullets. Now I have two problems.

When the first bullet is deleted the program crashes. This code works with the first element in the list.

Code:

else if(current->x == x && current->y == y)
   {
      temp = current;
      *headRef = current->next;
      free(temp);
   }

As a result of switching over to linked lists my bullet checking code no longer works. Maybe, I'm not comparing my variables correctly?

Code:

void checkBullets(struct bulletList* head)
{
   int i,k;
   struct bulletList* current = head;

   for(i = 0; i < MAX_ROW; i++)
   {
      for(k = 0; k < MAX_COL; k++)
      {
         while(current != NULL)
         {
              if((current->x > alien[i][k].x && 
                  current->x < alien[i][k].x+alien[i][k].width &&
                  current->y > alien[i][k].y && 
                  current->y < alien[i][k].y+alien[i][k].height) && 
                  alien[i][k].alive == 1)
              {
                  switch(alien[i][k].type)
                  {
                     case 1: player.score += 5; break;
                     case 2: player.score += 1000; break;
                     case 3: player.score += 75; break;
                  }                  

                  alien[i][k].alive = 0;  
              }
           current = current->next;
         }
      }
   }

}

Why dont you use vector instead of array/linked list? I think that would be the easiest and most reliable thing to use.
take a look at
c++ reference how to use the vector class