append_filename - Concatenates a filename to a path. Allegro game programming
library.
#include <allegro.h>
char *append_filename(char *dest, const char *path,
const char *filename, int size);
Concatenates the specified filename onto the end of the specified path, storing
at most `size' bytes into the `dest' buffer. If `path' doesn't have a trailing
path separator, the function will append one if needed. You can use the same
buffer both as input and output because Allegro internally works on a copy of
the input before touching `dest'. Example:
append_filename(buf, "/home/user",
"prog.bin", sizeof(buf));
Returns a copy of the `dest' parameter.