Fix -Wconstant-logical-operand error for Hurd

[Joseph Myers]

Building for Hurd with GCC mainline produces an error in pt-block.c
(here MSG_OPTIONS is a macro that may be defined before pt-block.c is
included by another source file):

In file included from ../sysdeps/mach/htl/pt-block-intr.c:6:
../sysdeps/mach/htl/pt-block.c: In function '__pthread_block_intr':
../sysdeps/mach/htl/pt-block.c:49:42: error: use of logical '&&' with constant operand '1024' [-Werror=constant-logical-operand]
   49 |   if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) && err == MACH_RCV_INTERRUPTED)
      |                                          ^~
../sysdeps/mach/htl/pt-block.c:49:42: note: use '&' for bitwise operation
   49 |   if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) && err == MACH_RCV_INTERRUPTED)
      |                                          ^~
      |                                          &

Fix this, and a similar error in pt-timedblock.c, with an explicit != 0.

Tested with build-many-glibcs.py (compilers and glibcs builds) for
i686-gnu and x86_64-gnu.

diff --git a/sysdeps/mach/htl/pt-block.c b/sysdeps/mach/htl/pt-block.c
index 40f65130bb..efc58059f0 100644
--- a/sysdeps/mach/htl/pt-block.c
+++ b/sysdeps/mach/htl/pt-block.c
@@ -46,7 +46,7 @@ __pthread_block (struct __pthread *thread)
   err = __mach_msg (&msg, MACH_RCV_MSG | MSG_OPTIONS, 0, sizeof msg,
 		    thread->wakeupmsg.msgh_remote_port,
 		    MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
-  if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) && err == MACH_RCV_INTERRUPTED)
+  if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) != 0 && err == MACH_RCV_INTERRUPTED)
     RETURN(EINTR);
   assert_perror (err);
   RETURN(0);
diff --git a/sysdeps/mach/htl/pt-timedblock.c b/sysdeps/mach/htl/pt-timedblock.c
index 99fdcd0dec..06244bde6c 100644
--- a/sysdeps/mach/htl/pt-timedblock.c
+++ b/sysdeps/mach/htl/pt-timedblock.c
@@ -63,7 +63,7 @@ __pthread_timedblock (struct __pthread *thread,
 		    timeout, MACH_PORT_NULL);
   if (err == EMACH_RCV_TIMED_OUT)
     return ETIMEDOUT;
-  if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) && err == MACH_RCV_INTERRUPTED)
+  if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) != 0 && err == MACH_RCV_INTERRUPTED)
     return EINTR;
 
   assert_perror (err);

-- 
Joseph S. Myers
josmyers@redhat.com