Guard an LLTRACE variable to silence an unused variable warning.
diff --git a/Python/ceval.c b/Python/ceval.c
index ae0bd24..7908d44 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -822,7 +822,9 @@
     PyObject *names;
     PyObject *consts;
 
+#ifdef LLTRACE
     _Py_IDENTIFIER(__ltrace__);
+#endif
 
 /* Computed GOTOs, or
        the-optimization-commonly-but-improperly-known-as-"threaded code"