C library for building dietcc passes

Example of using a pass:

    The examples/zero_init pass zero-initializes all local variables.

        $ which dietcc
        [make sure it's on your path!]
        $ cd examples/zero_init
        $ make -B
        $ ./default
        Foo return value: 0
        Foo return value: 32765
        Foo return value: 32765
        $ ./instrumented
        Foo return value: 0
        Foo return value: 0
        Foo return value: 0