16-ethercat-1.5-frame-corruption.patch

from ethercat-1.5.0-patches-v2.tar.bz2
by Frank Heckenbach f.heckenbach@ at fh-soft.de
Ref: http://lists.etherlab.org/pipermail/etherlab-dev/2014/000404.html
with some additional edits.

include/ecrt.h

@@ -956,8 +956,10 @@ int ecrt_master_set_send_interval(
  *
  * Has to be called cyclically by the application after ecrt_master_activate()
  * has returned.
+ *
+ * Returns the number of bytes sent.
  */
-void ecrt_master_send(
+size_t ecrt_master_send(
         ec_master_t *master /**< EtherCAT master. */
         );