chk_del() should not check key delete-chain

make a test for -inf more portable (-Inf)

client/mysqldump.c

@@ -1072,7 +1072,7 @@ static void dumpTable(uint numFields, char *table)
 	      {
 		/* change any strings ("inf", "-inf", "nan") into NULL */
 		char *ptr = row[i];
-		if (isalpha(*ptr) || (*ptr == '-' && *(ptr+1) == 'i'))
+		if (isalpha(*ptr) || (*ptr == '-' && isalpha(ptr[1])))
 		  dynstr_append(&extended_row, "NULL");
 		else
 		{
@@ -1118,7 +1118,7 @@ static void dumpTable(uint numFields, char *table)
 	      if (opt_xml)
 		fprintf(md_result_file, "\t\t<field name=\"%s\">%s</field>\n",
 			field->name,!isalpha(*ptr) ?ptr: "NULL");
-	      else if (isalpha(*ptr) || (*ptr == '-' && *(ptr+1) == 'i'))
+	      else if (isalpha(*ptr) || (*ptr == '-' && isalpha(ptr[1])))
 	        fputs("NULL", md_result_file);
 	      else
 	      {

myisam/mi_check.c

@@ -131,15 +131,8 @@ int chk_del(MI_CHECK *param, register MI_INFO *info, uint test_flag)
   char buff[22],buff2[22];
   DBUG_ENTER("chk_del");
 
-  if (!(test_flag & T_SILENT))
-    puts("- check key delete-chain");
-
   LINT_INIT(old_link);
   param->record_checksum=0;
-  param->key_file_blocks=info->s->base.keystart;
-  for (j=0 ; j < info->s->state.header.max_block_size ; j++)
-    if (check_k_link(param,info,j))
-      goto wrong;
   delete_link_length=((info->s->options & HA_OPTION_PACK_RECORD) ? 20 :
 		      info->s->rec_reflength+1);
 
@@ -362,6 +355,18 @@ int chk_key(MI_CHECK *param, register MI_INFO *info)
   char buff[22],buff2[22];
   DBUG_ENTER("chk_key");
 
+  if (!(param->testflag & T_SILENT))
+    puts("- check key delete-chain");
+
+  param->key_file_blocks=info->s->base.keystart;
+  for (key=0 ; key < info->s->state.header.max_block_size ; key++)
+    if (check_k_link(param,info,key))
+    {
+      if (param->testflag & T_VERBOSE) puts("");
+      mi_check_print_error(param,"key delete-link-chain corrupted");
+      DBUG_RETURN(-1);
+    }
+
   if (!(param->testflag & T_SILENT)) puts("- check index reference");
 
   all_keydata=all_totaldata=key_totlength=0;