Replace `ifNil:[...]` with `isNil ifTrue:[...]`
The latter is optimized by compilers and therefore faster.
@REM -------
@REM make using mingw gnu compiler
@REM type mingwmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
@REM -------
@SET DEFINES=
@REM Kludge got Mercurial, cannot be implemented in Borland make
@FOR /F "tokens=*" %%i in ('hg root') do SET HGROOT=%%i
@IF "%HGROOT%" NEQ "" SET DEFINES=%DEFINES% "-DHGROOT=%HGROOT%"
make.exe -N -f bc.mak %USEMINGW_ARG% %DEFINES% %*