- add debugging code to memory allocation

= atom to number: cleanup function name as this is more than just supporting SWI
- SrcMask only applies to rules.
- add auxiliary type/error function
- fix typos
- fix enumeration mode in current_flag
- get rid of TrueName routines, use AbsoluteFileName instead.
- detail synatx error source

C/cdmgr.c

@@ -3647,7 +3647,7 @@ static Int fetch_next_static_clause(PredEntry *pe, yamop *i_code, Term th,
      don't do this!! I might have stored a choice-point and changed ASP
      Yap_RecoverSlots(3);
   */
-  if (cl == NULL || !(cl->ClFlags & SrcMask)) {
+  if (cl == NULL || !(pe->PredFlags & SourcePredFlag)) {
     UNLOCKPE(45, pe);
     return false;
   }
@@ -3703,7 +3703,7 @@ static Int fetch_next_static_clause(PredEntry *pe, yamop *i_code, Term th,
       P = cl->ClCode;
     }
     UNLOCKPE(45, pe);
-    return TRUE;
+    return true;
   } else {
     Term t;