Fixed:

 - a 64 bit compile warning in embedded
 - disabled the new (and failing tests for Bug#36522


libmysqld/lib_sql.cc:
  Fixed: win64 warning
mysql-test/t/disabled.def:
  Disabled the new (and failing) tests for 36522

libmysqld/lib_sql.cc

@@ -285,7 +285,7 @@ static int emb_stmt_execute(MYSQL_STMT *stmt)
   my_bool res;
 
   int4store(header, stmt->stmt_id);
-  header[4]= stmt->flags;
+  header[4]= (char)stmt->flags;
   thd= (THD*)stmt->mysql->thd;
   thd->client_param_count= stmt->param_count;
   thd->client_params= stmt->params;

mysql-test/t/disabled.def

@@ -14,4 +14,6 @@ status               : Bug#32966 main.status fails
 ps_ddl               : Bug#12093 2007-12-14 pending WL#4165 / WL#4166
 csv_alter_table      : Bug#33696 2008-01-21 pcrews no .result file - bug allows NULL columns in CSV tables
 user_limits     : Bug#23921 random failure of user_limits.test
-
+key_buffer_size_basic_64    : Bug #36522: Some tests of system variables have diffs on 64bit platorms
+rpl_recovery_rank_basic_64  : Bug #36522: Some tests of system variables have diffs on 64bit platorms
+sort_buffer_size_basic_64   : Bug #36522: Some tests of system variables have diffs on 64bit platorms