Fix compilation warning on win32.
diff --git a/compat/jansson/jansson.h b/compat/jansson/jansson.h
index 3abb4cf..9372ec2 100644
--- a/compat/jansson/jansson.h
+++ b/compat/jansson/jansson.h
@@ -52,7 +52,7 @@ typedef struct {
size_t refcount;
} json_t;
-#if JSON_INTEGER_IS_LONG_LONG
+#if JSON_INTEGER_IS_LONG_LONG && (!defined(WIN32))
#define JSON_INTEGER_FORMAT "lld"
typedef long long json_int_t;
#else