Detect the colons (:) which make up secondary bitfield declarations and
apply binary colon checks.  For example the following is common idiom:

	int foo:1,
	    bar:1;
Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>