[dct] fix radix check for accelerate

diff --git a/src/spectral/dct.c b/src/spectral/dct.c
index 48f6cd2..16cd2a9 100644 (file)
--- a/src/spectral/dct.c
+++ b/src/spectral/dct.c
@@ -87,7 +87,7 @@ aubio_dct_t* new_aubio_dct (uint_t size) {
   {
     uint_t radix = size;
     uint_t order = 0;
   {
     uint_t radix = size;
     uint_t order = 0;

-    while ((radix / 2) * 2 == radix) {
+    while ((radix >= 1) && ((radix / 2) * 2 == radix)) {

       radix /= 2;
       order++;
     }
       radix /= 2;
       order++;
     }