writing smpl medatadata into a wave file

[neuwirthe]

Before continuing with the bug report, does updating to the latest version fix this issue? [Yes/No] No

Describe the bug A clear and concise description of what the bug is.

When I yse pymisiclooper to write looping meta information into a wave file, the resulting wave file does not have an smpl chunk. It has information about the looping points, but they seem not to be embedded in an smpl chunk. In a hex editor, the last part of the file looks like this

)JNSXWš[Ã_Ðc¹g{kodr{uFx¸zÆ|_~vøÓö~M}ÄzKwÐrGm¤få^VL/AX5»(‚Ý ID3 U