fix qsave_module

C/qlyr.c

@@ -193,7 +193,7 @@ InsertPredEntry(PredEntry *op, PredEntry *pe)
   import_pred_entry_hash_entry_t *p;
 
   if (LOCAL_ImportPredEntryHashTableSize == 0)
-    return NULL;
+    return;
   hash = (CELL)(op) % LOCAL_ImportPredEntryHashTableSize;
   p = LOCAL_ImportPredEntryHashChain[hash];
   while (p) {

C/qlyw.c

@@ -922,7 +922,6 @@ p_save_module_preds( USES_REGS1 )
     Yap_Error(TYPE_ERROR_ATOM,tmod,"save_module/2");
     return FALSE;
   }
-  save_header( stream );
   return save_module(stream, tmod) != 0;
 }