deprecation: update policy for handling former se3 namespace

src/deprecated-namespaces.hpp

@@ -18,8 +18,10 @@
 #ifndef __pinocchio_deprecated_namespaces_hpp__
 #define __pinocchio_deprecated_namespaces_hpp__
 
-#ifdef PINOCCHIO_ENABLE_COMPATIBILITY_WITH_VERSION_1
-#define se3 PINOCCHIO_PRAGMA_MESSAGE_CALL("The se3 namespace has been set to deprecated since version 2.0.0. Please use namespace pinocchio instead") pinocchio
+#if PINOCCHIO_ENABLE_COMPATIBILITY_WITH_VERSION_1 // do not warn
+  #define se3 ::pinocchio
+#else
+  #define se3 PINOCCHIO_PRAGMA_MESSAGE_CALL("The se3 namespace has been deprecated since version 2.0.0. Please use namespace pinocchio instead.") ::pinocchio
 #endif
 
 #endif // ifndef __pinocchio_deprecated_namespaces_hpp__