Add NSDictionary initWithOptionalObjects:forKeys:count: helper, to work
around several places that may have been setting nil dictionary valies
on placeholder dictionaries. Hopefully this fixes the crash someone
logged recently.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
Most file formats the player supports may or may not have UTF-8 safe
strings in their metadata. This should not be assumed to be UTF-8, and
when it is assumed, it results in nil NSString objects, which results in
inline initializers crashing due to uncaught exceptions.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
