C std question: while loop with two tests.

["Steve Ellcey " <sellcey@xxxxxxxxxx>]

I was using delta to cutdown a program and wound up with something like this.
Is this really legal C?  GCC doesn't complain about it.

    int foo(int x)
    {
	while (1)
	{
	    if (x > 0) continue;
	} while (0);
    }

Steve Ellcey
sellcey@xxxxxxxxxx