blob/blobmsg: add explicit typecasts for attribute iterators

[project/libubox.git] / blobmsg.h

diff --git a/blobmsg.h b/blobmsg.h
index 84997a6..861a4e8 100644 (file)
--- a/blobmsg.h
+++ b/blobmsg.h
@@ -233,7 +233,7 @@ int blobmsg_printf(struct blob_buf *buf, const char *name, const char *format, .
 
 #define blobmsg_for_each_attr(pos, attr, rem) \
        for (rem = attr ? blobmsg_data_len(attr) : 0, \
-            pos = attr ? blobmsg_data(attr) : 0; \
+            pos = (struct blob_attr *) (attr ? blobmsg_data(attr) : NULL); \
             rem > 0 && (blob_pad_len(pos) <= rem) && \
             (blob_pad_len(pos) >= sizeof(struct blob_attr)); \
             rem -= blob_pad_len(pos), pos = blob_next(pos))