BUG#57098 RBR breaks on changing user password on 5.1 master -> 5.5 slave

Backported the patch for BUG#55452.

sql/sql_acl.cc

@@ -1593,6 +1593,7 @@ bool change_password(THD *thd, const char *host, const char *user,
   /* Buffer should be extended when password length is extended. */
   char buff[512];
   ulong query_length;
+  bool save_binlog_row_based;
   uint new_password_len= (uint) strlen(new_password);
   bool result= 1;
   DBUG_ENTER("change_password");
@@ -1628,6 +1629,14 @@ bool change_password(THD *thd, const char *host, const char *user,
   if (!(table= open_ltable(thd, &tables, TL_WRITE, 0)))
     DBUG_RETURN(1);
 
+  /*
+    This statement will be replicated as a statement, even when using
+    row-based replication.  The flag will be reset at the end of the
+    statement.
+  */
+  if ((save_binlog_row_based= thd->current_stmt_binlog_row_based))
+    thd->clear_current_stmt_binlog_row_based();
+
   VOID(pthread_mutex_lock(&acl_cache->lock));
   ACL_USER *acl_user;
   if (!(acl_user= find_acl_user(host, user, TRUE)))
@@ -1663,6 +1672,12 @@ bool change_password(THD *thd, const char *host, const char *user,
   }
 end:
   close_thread_tables(thd);
+
+  /* Restore the state of binlog format */
+  DBUG_ASSERT(!thd->current_stmt_binlog_row_based);
+  if (save_binlog_row_based)
+    thd->set_current_stmt_binlog_row_based();
+
   DBUG_RETURN(result);
 }