Make allocations based on var size, not struct size - it's safer

client_pool.c

@@ -85,9 +85,9 @@ void *client_pool(void *args)
 	struct pool_data *pool = args;
 	pthread_mutex_t mutex;
 	pthread_attr_t attr;
-	pthread_t *client_thread = (pthread_t *)malloc(pool->size * sizeof(pthread_t));
+	pthread_t *client_thread = malloc(pool->size * sizeof(*client_thread));
 	struct client_args *client_struct =
-			(struct client_args *)malloc(pool->size * sizeof(struct client_args));
+		malloc(pool->size * sizeof(*client_struct));
 	int i;
 
 	memset(client_thread, 0, sizeof(pthread_t) * pool->size);