Allow single underscore as method / block argument and temporaries
This commit is a follow up for 38b221e.
@REM -------@REM make using tcc compiler (Tiny-C)@REM type tccmake, and wait...@REM do not edit - automatically generated from ProjectDefinition@REM -------make.exe -N -f bc.mak USETCC=1 %1 %2