[physfs] Not finding any directories

[Ryan C. Gordon]

> char **rc = PHYSFS_enumerateFiles("music");
> 23:27:47 >  * We've got dir [CD 4].     ß-- These are directories

PHYSFS_isDirectory("CD 4") is not the same as 
PHYSFS_isDirectory("music/CD 4");

PHYSFS_enumerateFiles() doesn't give you the full path, just the items 
in a given directory.

--ryan.