Blocked signals are incorrectly queued/dequeued.

[Christopher Faylor]

On Sun, Mar 11, 2001 at 05:41:47AM +0900, Kazuhiro Fujieda wrote:
>The test program attached below shows the following behavior on
>NT4 Sp6a and the latest Cygwin DLL.
>1. Blocked signals are queued.
>2. One of them are dequeued when the block is released.
>3. Others are dequeued two by two when other signals are triggered.

Thanks for the easy-to-understand test case.  I've checked in a fix
for this.

cgf