fix potential segfault happening when only -trace is provided to smpi

diff --git a/src/surf/sg_platf.cpp b/src/surf/sg_platf.cpp
index c925a4c..c55dd85 100644 (file)
--- a/src/surf/sg_platf.cpp
+++ b/src/surf/sg_platf.cpp
@@ -117,7 +117,7 @@ void sg_platf_new_router(sg_platf_router_cbarg_t router)
     XBT_DEBUG("Having set router coordinates for '%s'",router->id);
   }
 
     XBT_DEBUG("Having set router coordinates for '%s'",router->id);
   }
 

-  if (TRACE_is_enabled())
+  if (TRACE_is_enabled() && TRACE_needs_platform())

     sg_instr_new_router(router);
 }
 
     sg_instr_new_router(router);
 }