Fix invalid free crash in bookmarks loading code reported by Gids on IRC. Small test...

Fix invalid free crash in bookmarks loading code reported by Gids on IRC. Small test case is: (I'm not sure that it really needs to be that long)
#EXTVLCOPT:bookmarks={name=Rainforest Shmainforest,bytes=5276429,time=1},{name=Spontaneous Combustion,bytes=113071718,time=1331},{name=The Succubus,bytes=218546569,time=2663},{name=Jakovasaurs,bytes=326602991,time=3999},{name=Tweek Vs. Craig,bytes=436968699,time=5326},{name=Sexual Harassment Panda,bytes=542655194,time=6658}
episodes-1-6.m4v