sbrk inertia

[pat]

Calls to sbrk(II) appear to have a delayed effect in our Berkeley VAX 4.1 
system.

main()
{
	printf( "sbrk(0) = %x\n", sbrk(0) );
	printf( "sbrk(1) = %x\n", sbrk(1) );
	printf( "sbrk(0) = %x\n", sbrk(0) );
}

produces the following output:

sbrk(0) = 19c4
sbrk(1) = 19c4
sbrk(0) = 19c5