fix: unused varibles in vfs

[AndreCostaaa]

so3/so3/fs/vfs.c

Lines 292 to 304 in 9fd2100

	uint32_t vfs_get_access_mode(int gfd)
	{
	uint32_t ret;
	mutex_lock(&vfs_lock);
	if (open_fds[gfd])
	ret = open_fds[gfd]->flags_access_mode;
	mutex_unlock(&vfs_lock);
	return ret;
	}

so3/so3/fs/vfs.c

Lines 315 to 326 in 9fd2100

	uint32_t vfs_get_operating_mode(int gfd)
	{
	uint32_t ret;
	mutex_lock(&vfs_lock);
	if (open_fds[gfd])
	ret = open_fds[gfd]->flags_operating_mode;
	mutex_unlock(&vfs_lock);
	return ret;
	}

ret is returned uninitialized whenever the if condition is false in both of these functions