Issue a warning on dangerous (but not impossible) situation

[simgrid.git] / src / gras / Msg / msg.c

diff --git a/src/gras/Msg/msg.c b/src/gras/Msg/msg.c
index 33cee8c..777fcd0 100644 (file)
--- a/src/gras/Msg/msg.c
+++ b/src/gras/Msg/msg.c
@@ -139,7 +139,10 @@ gras_msgtype_declare_v(const char           *name,
   xbt_error_t   errcode;
   gras_msgtype_t msgtype;
   char *namev=make_namev(name,version);
-  
+   
+  if (!payload) 
+     WARN1("Message %s has NULL payload",name);
+   
   errcode = xbt_set_get_by_name(_gras_msgtype_set,
                                 namev,(xbt_set_elm_t*)&msgtype);