fix ssh-pkcs11-client.c missing ifdef (#597)

Author: awakecoding

monitor.c

@@ -83,6 +83,7 @@
 #include "canohost.h"
 #include "log.h"
 #include "misc.h"
+#include "msg.h"
 #include "servconf.h"
 #include "monitor.h"
 #ifdef GSSAPI

ssh-pkcs11-client.c

@@ -509,10 +509,12 @@ pkcs11_start_helper(void)
 #endif
 	/* success */
 	debug3_f("started pid=%ld", (long)pid);
+#ifdef WINDOWS
 out:
 	if (client_token)
 		CloseHandle(client_token);
 	return r;
+#endif
 }
 
 int