IO patches

simplify error handling
use get and inject
use wide support in OS
be stricter in checkin streams and arguments

H/hstruct.h

@@ -102,8 +102,6 @@
   Term  dbload_module;
   Term  range_module;
 
-  Prop  hidden_predicates;
-
 
 
   struct mod_entry  *current_modules;
@@ -111,6 +109,8 @@
 
 
 
+  Prop  hidden_predicates;
+
 
 
   union flagTerm*  GLOBAL_Flags_;