K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2010-01-27T09:59:08.144792Z
K 7
svn:log
V 219
KASSERT that return value of interrupt filter complies with contract

For example a return value of zero could lead to a stuck level-triggered
interrupt line.

Reviewed by:	jhb (for INTR_FILTER case)
MFC after:	3 weeks

END