test_cxalloc: fix printf warning

diff --git a/test/test_cxalloc.c b/test/test_cxalloc.c
index cd33325a53614d4784fa83c55079c1e792a23978..267f314832827f68f5c7125dfcdbfbce6b5e721a 100644 (file)
--- a/test/test_cxalloc.c
+++ b/test/test_cxalloc.c
@@ -13,6 +13,7 @@ static void reset(void)
        logbuf[0] = 0;
 }
 
+_PRINTF(1,2)
 static void m_log(const char *fmt, ...)
 {
        size_t len = strlen(logbuf);