Fixed short circuiting on non-Windows platforms

def run_in_subprocess(builder_function):

    # Run in subprocess only while running the build on Windows

    if sys.platform not in ('win32', 'cygwin'):

        return builder_function

    @functools.wraps(builder_function)

    def wrapper(target, source, env):

        target = [node.srcnode().abspath for node in target]

        source = [node.srcnode().abspath for node in source]

        # Short circuit on non-Windows platforms, no need to run in subprocess

        if sys.platform not in ('win32', 'cygwin'):

            return builder_function(target, source, env)

        # Identify module

        module_name = builder_function.__module__

        function_name = builder_function.__name__