tccgen: nocode_wanted++/--
tccgen: nocode_wanted++/--

uses 'nocode_wanted' as a level couter instead of
'saved_nocode_wanted' everywhere.

run4flat/tinycc,mirror/tinycc,avih/tinycc,avih/tinycc,mingodad/tinycc,avih/tinycc,code4game/tinycc,andreiw/tinycc,andreiw/tinycc,run4flat/tinycc,mingodad/tinycc,andreiw/tinycc,mirror/tinycc,mingodad/tinycc,avih/tinycc,run4flat/tinycc,code4game/tinycc,mirror/tinycc,mirror/tinycc,code4game/tinycc,run4flat/tinycc,mingodad/tinycc,run4flat/tinycc