many warnings (practically safe but annoying) corrected

client/mysqladmin.cc:
  don't use the handler after it's closed
client/mysqlbinlog.cc:
  memory leak
client/mysqldump.c:
  many "ignore return value" warnings, one "NULL dereference"
cmd-line-utils/libedit/history.c:
  memory leak
include/my_base.h:
  cleanup
libmysql/libmysql.c:
  "return value ignored" warning
myisam/mi_delete.c:
  "return value ignored" warning
myisam/myisampack.c:
  "out-of-bound access" warning
myisam/sort.c:
  "double free" warning
mysys/default_modify.c:
  "double free" warning
mysys/mf_iocache2.c:
  "return value ignored" warnings
mysys/my_bitmap.c:
  s/return/DBUG_RETURN/
mysys/my_error.c:
  memory leak
server-tools/instance-manager/parse.cc:
  "NULL dereference" warning
sql-common/client.c:
  "NULL dereference" warning
sql/field.cc:
  deadcode, "NULL dereference", "uninitialized" warnings
sql/field.h:
  unused parameters removed from constructor
sql/ha_myisam.cc:
  "return value ignored" warnings
sql/item.cc:
  "return value ignored" warnings
  changed constructor
sql/item_func.cc:
  "return value ignored" warnings
sql/log_event.cc:
  uninitialized warning
sql/opt_range.cc:
  "double free" and uninitialized warnings
sql/opt_range.h:
  "return value ignored" warning
sql/repl_failsafe.cc:
  "return value ignored" warning
sql/set_var.cc:
  "return value ignored" warning
sql/slave.cc:
  "return value ignored" warnings
sql/slave.h:
  new prototype
sql/sql_acl.cc:
  deadcode and "NULL dereference" warnings
sql/sql_db.cc:
  "return value ignored" warning
sql/sql_handler.cc:
  "NULL dereference" warning
sql/sql_help.cc:
  "NULL dereference" warning
sql/sql_insert.cc:
  "return value ignored" warning
sql/sql_parse.cc:
  "return value ignored" warning
  one more DBUG_ASSERT
sql/sql_repl.cc:
  "return value ignored" and memory leak warnings
sql/sql_show.cc:
  "return value ignored" and "NULL dereference"  warnings
sql/sql_test.cc:
  "return value ignored" warning
sql/table.cc:
  memory leak
sql/uniques.cc:
  "return value ignored" warning
  endspaces deleted

1 files changed, 2 insertions, 4 deletions

diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index cd83efcac2c..b07a034dfd7 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -937,7 +937,7 @@ bool acl_getroot_no_password(Security_context *sctx, char *user, char *host,
 
   DBUG_PRINT("enter", ("Host: '%s', Ip: '%s', User: '%s', db: '%s'",
                        (host ? host : "(NULL)"), (ip ? ip : "(NULL)"),
-                       (user ? user : "(NULL)"), (db ? db : "(NULL)")));
+                       user, (db ? db : "(NULL)")));
   sctx->user= user;
   sctx->host= host;
   sctx->ip= ip;
@@ -966,7 +966,7 @@ bool acl_getroot_no_password(Security_context *sctx, char *user, char *host,
   for (i=0 ; i < acl_users.elements ; i++)
   {
     acl_user= dynamic_element(&acl_users,i,ACL_USER*);
-    if ((!acl_user->user && (!user || !user[0])) ||
+    if ((!acl_user->user && !user[0]) ||
 	(acl_user->user && strcmp(user, acl_user->user) == 0))
     {
       if (compare_hostname(&acl_user->host, host, ip))
@@ -4939,8 +4939,6 @@ static int handle_grant_struct(uint struct_no, bool drop,
     }
     if (! user)
       user= "";
-    if (! host)
-      host= "";
 #ifdef EXTRA_DEBUG
     DBUG_PRINT("loop",("scan struct: %u  index: %u  user: '%s'  host: '%s'",
                        struct_no, idx, user, host));