From f4496dc0807d9a29a7ba0d170b49f7ca9b306a9f Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Thu, 26 Oct 2017 03:06:00 +0200
Subject: [PATCH] Prevent stack corruption with parallelized use.

If the length of the data set for the transform is a prime, then the OpenMP parallelization results
in a recursion loop until the stack is corrupted or exhausted.
This resolves #1.
---
 kiss_fft.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kiss_fft.c b/kiss_fft.c
index af2f695..5614838 100644
--- a/kiss_fft.c
+++ b/kiss_fft.c
@@ -246,7 +246,7 @@ void kf_work(
 #ifdef _OPENMP
     // use openmp extensions at the 
     // top-level (not recursive)
-    if (fstride==1 && p<=5)
+    if (fstride==1 && p<=5 && m!=1)
     {
         int k;