fix(libacron/acronc/helloworld): ac_receive: 'read' should be the delta value of bytes read in the call, not the absolute position

Also clearify that 'read' is undefined if the function fails.

1 files changed, 2 insertions, 1 deletions

diff --git a/client/libacron/README.md b/client/libacron/README.md
index 736b44a..bc7e879 100644
--- a/client/libacron/README.md
+++ b/client/libacron/README.md
@@ -215,9 +215,10 @@ size_t read;
 while (1) {
     if ((r = ac_receive(connection, buffer, pos, len, &obj, &read))) {
         /* Handle error. */
+        /* read is undefined. */
         break;
     }
-    pos += read;
+    pos += read; /* read is the bytes read in the last call. */
     /* The obj is now referencing to a library allocated event or response. */
     /* Do things with the event or response. */
     ac_obj_free(obj);