(free_all_cache): Don't attempt to access Pers_no, Conf_no or Text_no 0.

(get_conf_node): Fail if the argument is less than 1.
(get_pers_node): Likewise.
(get_text_node): Likewise.
(traverse_person): Unused function; don't compile it.

src/server/simple-cache.c

 /*
- * $Id: simple-cache.c,v 0.67 1998/07/26 16:42:45 ceder Exp $
+ * $Id: simple-cache.c,v 0.68 1998/08/14 18:54:48 ceder Exp $
  * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996  Lysator Academic Computer Association.
  *
  * This file is part of the LysKOM server.
@@ -35,7 +35,7 @@
  */
 
 static const char *
-rcsid = "$Id: simple-cache.c,v 0.67 1998/07/26 16:42:45 ceder Exp $";
+rcsid = "$Id: simple-cache.c,v 0.68 1998/08/14 18:54:48 ceder Exp $";
 #include "rcs.h"
 USE(rcsid);
 
@@ -312,7 +312,7 @@ conf_set_mru(Conf_no conf_no)
 static Cache_node *
 get_pers_node(Pers_no pers_no)
 {
-    if ( pers_no >= next_free_num )
+    if (pers_no >= next_free_num || pers_no < 1)
 	return NULL;
 
     return get_cache_node(pers_mcb, pers_no);
@@ -339,7 +339,7 @@ unlink_pers_lru (Cache_node *node)
 static Cache_node *
 get_conf_node(Conf_no conf_no)
 {
-    if ( conf_no >= next_free_num )
+    if (conf_no >= next_free_num || conf_no < 1)
 	return NULL;
 
     return get_cache_node(conf_mcb, conf_no);
@@ -348,7 +348,7 @@ get_conf_node(Conf_no conf_no)
 static Cache_node *
 get_text_node(Text_no text_no)
 {
-    if ( text_no >= next_text_num )
+    if (text_no >= next_text_num || text_no < 1)
 	return NULL;
 
     return get_cache_node(text_mcb, text_no);
@@ -1065,6 +1065,7 @@ traverse_text(Text_no seed)
     return (seed >= next_text_num) ? 0 : seed ;
 }
 
+#if 0 /* This is not used, but should work OK. */
 Pers_no
 traverse_person(Pers_no seed)
 {
@@ -1083,6 +1084,7 @@ traverse_person(Pers_no seed)
 
     return (seed >= next_free_num) ? 0 : seed ;
 }
+#endif
 
 Conf_no
 traverse_conference(Conf_no seed)
@@ -2445,7 +2447,7 @@ free_all_cache (void)
 	fclose(logfile);
 #endif
 
-    for ( i = 0; i < next_free_num; i++ )
+    for ( i = 1; i < next_free_num; i++ )
     {
 	node = get_conf_node(i);
 	if ( node != NULL )
@@ -2490,7 +2492,7 @@ free_all_cache (void)
 	}
     }
 
-    for ( i = 0; i < next_text_num; i++ )
+    for ( i = 1; i < next_text_num; i++ )
     {
 	node = get_text_node(i);
 	if ( node != NULL )