Fix silly bug in handling of Mac Roman font names. Make Mac font search more exhaustive if the faster prefix check fails. Added a bunch of debug printfs in case those aren't sufficient to get things working on other machines

#ifndef PPM_H_
#define PPM_H_

void save_ppm(FILE *f, uint32_t *buffer, uint32_t width, uint32_t height, uint32_t pitch);

#endif //PPM_H_