#2 Sometimes crashes when calling rfftw_destroy_plan

[Phil Carmalt]

rfftw_destroy_plan (Waon_Globals::m_Plan);

line 558 of Waon_Main.cpp (v0_1_0_0 cvs tag)

Not sure why since this is WaoN code. Generally happens
after loading a few different files. Maybe I'm not
cleaning up properly.