ws2_32: Make wait in WSAPoll() alertable.

dlls/ws2_32/socket.c

@@ -2994,7 +2994,7 @@ int WINAPI WSAPoll( WSAPOLLFD *fds, ULONG count, int timeout )
                                     params, params_size, params, params_size );
     if (status == STATUS_PENDING)
     {
-        if (WaitForSingleObject( sync_event, INFINITE ) == WAIT_FAILED)
+        if (wait_event_alertable( sync_event ) == WAIT_FAILED)
         {
             free( params );
             return -1;

dlls/ws2_32/tests/sock.c

@@ -8122,7 +8122,11 @@ static void test_WSAPoll(void)
     fds[0].fd = client;
     fds[0].events = POLLRDNORM | POLLRDBAND;
     fds[0].revents = 0xdead;
+    apc_count = 0;
+    ret = QueueUserAPC(apc_func, GetCurrentThread(), (ULONG_PTR)&apc_count);
+    ok(ret, "QueueUserAPC returned %d\n", ret);
     ret = pWSAPoll(fds, 1, 2000);
+    ok(apc_count == 1, "APC was called %u times\n", apc_count);
     ok(ret == 1, "got %d\n", ret);
     ok(fds[0].revents == POLLNVAL, "got events %#x\n", fds[0].revents);
     ret = WaitForSingleObject(thread_handle, 1000);