win32 fopen only ansi encoding.
if filePath contains utf8 characters fopen fail.
AudioCache FileFormat::OGG bag, can't open file, if filePath contains
utf8.
Need make all filename for fopen correct encoding.
Only Win32 FileUtils::getSuitableFOpen return
StringUtf8ToAnsi(filename),
other platform return filename
all fopen use FileUtils::getSuitableFOpen
Constify arguments to copy constuctors. Without this gcc fail to compile if classes used inside containers.
Error message is rather cryptic: " error: 'constexpr std::pair<_T1, _T2>::pair(const std::pair<_T1, _T2>&) [with _T1 = const int; _T2 = cocos2d::experimental::AudioPlayer]' declared to take const reference, but implicit declaration would take non-const"
James Chen