NtPulseEvent: Don't print FIXME for an optional parameter if it isn't
used.

diff --git a/dlls/ntdll/sync.c b/dlls/ntdll/sync.c
index b2e2813..c19326f 100644
--- a/dlls/ntdll/sync.c
+++ b/dlls/ntdll/sync.c
@@ -262,7 +262,10 @@
 NTSTATUS WINAPI NtPulseEvent( HANDLE handle, PULONG PulseCount )
 {
     NTSTATUS ret;
-    FIXME("(%p,%p)\n", handle, PulseCount);
+
+    if (PulseCount)
+      FIXME("(%p,%ld)\n", handle, *PulseCount);
+
     SERVER_START_REQ( event_op )
     {
         req->handle = handle;