MDEV-26351 segfault - (MARIA_HA *) 0x0 in ha_maria::extra

don't let Aria create a table that it cannot open

mysql-test/r/tmp_table_error.result

@@ -2630,5 +2630,5 @@ b as c2624,
 b as c2626
 from t1
 ) as tt1;
-ERROR HY000: Index for table 'tmp' is corrupt; try to repair it
+ERROR 0A000: Aria table 'tmp' has too many columns and/or indexes and/or unique constraints.
 drop table t1;

mysql-test/t/tmp_table_error.test

@@ -6,7 +6,7 @@ create table t1 (
 ) engine=innodb;
 
 --replace_regex /'.*'/'tmp'/
---error 126
+--error 140
 create table t2 as
 select
     1

storage/maria/ma_create.c

@@ -716,9 +716,10 @@ int maria_create(const char *name, enum data_file_type datafile_type,
     share.base.extra_options|= MA_EXTRA_OPTIONS_INSERT_ORDER;
   }
 
+  share.state.state.key_file_length= MY_ALIGN(info_length, maria_block_size);
   DBUG_PRINT("info", ("info_length: %u", info_length));
   /* There are only 16 bits for the total header length. */
-  if (info_length > 65535)
+  if (share.state.state.key_file_length > 65535)
   {
     my_printf_error(HA_WRONG_CREATE_OPTION,
                     "Aria table '%s' has too many columns and/or "
@@ -775,8 +776,7 @@ int maria_create(const char *name, enum data_file_type datafile_type,
 
   maria_set_all_keys_active(share.state.key_map, keys);
 
-  share.base.keystart = share.state.state.key_file_length=
-    MY_ALIGN(info_length, maria_block_size);
+  share.base.keystart = share.state.state.key_file_length;
   share.base.max_key_block_length= maria_block_size;
   share.base.max_key_length=ALIGN_SIZE(max_key_length+4);
   share.base.records=ci->max_rows;