bit-field notation and k&r function syntax

[Lance Richardson <lrichard@redhat.com>]

I noticed when browsing parse.c that function parameters declared
using K&R syntax are parsed by calling declaration_list(), which
seems to have been intended for parsing structure member declarations
and accepts bit-field syntax.

So e.g. this is (incorrectly) accepted by sparse:

static int foo(b)
int b: 4;
{
	return 0;
}