Issue a warning on dangerous (but not impossible) situation

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@1289 48e7efb5-ca39-0410-a469-dd3cf9ba447f

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);