Define MESGERR explicitly as requested by med_utils.h
Index: syrthes/src/util/convert2syrthes/lecture_med.c
===================================================================
--- syrthes.orig/src/util/convert2syrthes/lecture_med.c	2011-02-09 00:57:32.000000000 +0100
+++ syrthes/src/util/convert2syrthes/lecture_med.c	2011-02-09 00:57:46.000000000 +0100
@@ -42,7 +42,7 @@
 
 /* include MED */
 #include <med.h>
-#define MESGERR
+#define MESGERR 1
 #include <med_utils.h>
 
 int ouvrir_med(struct typ_maillage *maillage, /* INOUT structure de maillage */
