test/regress_buffer.c: fix -Wbad-function-cast (in some specific env)

Fixes: #1054

diff --git a/test/regress_buffer.c b/test/regress_buffer.c
index f259b924bff06b8c10861debddf5c3434903fad5..fca74062f20f3a2f8e226103e80394729d531dcb 100644 (file)
--- a/test/regress_buffer.c
+++ b/test/regress_buffer.c
@@ -441,7 +441,7 @@ test_evbuffer_pullup_with_empty(void *ptr)
        buf = evbuffer_new();
        evbuffer_validate(buf);
        tt_int_op(evbuffer_get_length(buf), ==, 0);
-       tt_int_op(evbuffer_pullup(buf, -1), ==, NULL);
+       tt_assert(evbuffer_pullup(buf, -1) == NULL);
 
        evbuffer_free(buf);
        buf = evbuffer_new();