libsdl segfault when accessing audio, while doing an implicit conversion from the user format to the driver format, if the conversion increase the size of the stream. I tested it with bzflag, alsa and dmix. The fix hereafter fix the fault. It does not fix the sound, as the conversion is not good enough, but at least I can hear an "accelerated' sound without any memory problem. patch will follow
Created attachment 100034 [details, diff] libsdl-1.2.11-audioConv.patch
Applied to portage. Thanks :)