Ensure at least the specified ringbuffer size is writable

Previously, all but one of the specified size could be written (so for a size
of n, only n-1 was guaranteed writable). All users pretty much compensated for
this, but it makes more sense to fix it at the source.

1 files changed, 1 insertions, 1 deletions

diff --git a/Alc/backends/coreaudio.c b/Alc/backends/coreaudio.c
index caa01167..b2545c47 100644
--- a/Alc/backends/coreaudio.c
+++ b/Alc/backends/coreaudio.c
@@ -663,7 +663,7 @@ static ALCenum ALCcoreAudioCapture_open(ALCcoreAudioCapture *self, const ALCchar
         goto error;
 
     self->ring = ll_ringbuffer_create(
-        device->UpdateSize*self->sampleRateRatio*device->NumUpdates + 1,
+        (size_t)ceil(device->UpdateSize*self->sampleRateRatio*device->NumUpdates),
         self->frameSize, false
     );
     if(!self->ring) goto error;