fix C major issues

- use delays to implement setup_call
- fix user_* flag
- error handling i CXX should b local
- fix mess on  how to call openQuert
- deter pt -> from a pointer to another one
- avoid text forms when you can use C: LOCLS to locals.h
- fux seto_call
- new gated call
- mem streams

include/YapInterface.h

@@ -688,6 +688,8 @@ extern X_API YAP_Functor YAP_IntToFunctor(YAP_Int i);
 
 extern X_API YAP_PredEntryPtr YAP_TopGoal(void);
 
+extern X_API void *YAP_GetStreamFromId(int no);
+
 #define YAP_InitCPred(N, A, F) YAP_UserCPredicate(N, F, A)
 
 __END_DECLS