macosx: fix memleaks in podcast handling, remove unnecessary module restart
macosx: fix memleaks in podcast handling, remove unnecessary module restart

(cherry picked from commit 3788f1cb25bea9f38d19a22e496474bfdd5a6ef1)
Signed-off-by: Felix Paul Kühne <af44a38b4065def9b90f0b66e4658837dd45b77d@videolan.org>

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2