Add comment block matching the type defines added by RS.

/*

// block of defines matching what RS will insert at runtime.

struct Params_s{

    int inHeight;

    int inWidth;

    int outHeight;

    int outWidth;

    float threshold;

};

struct Params_s * Params;

struct InPixel_s{

    char a;

    char b;

    char g;

    char r;

};

struct InPixel_s * InPixel;

struct OutPixel_s{

    char a;

    char b;

    char g;

    char r;

};

struct OutPixel_s * OutPixel;

*/

struct color_s {

    char b;

    char g;

    int i;

    float threshold = (Params->threshold * 255.f);

    //testFnc(count, threshold, in, out);

    for (i = 0; i < count; i++) {

        float luminance = 0.2125f * in->r +

                          0.7154f * in->g +