audio: another wrong struct that causes NULL pointer crash (thanks, Simon!). Fixes Bugzilla #3632.
diff --git a/src/audio/SDL_audio.c b/src/audio/SDL_audio.c
index 45d137d..ae076b2 100644
--- a/src/audio/SDL_audio.c
+++ b/src/audio/SDL_audio.c
@@ -733,7 +733,7 @@ SDL_CaptureAudio(void *devicep)
const int data_len = device->spec.size;
Uint8 *data;
void *udata = device->spec.userdata;
- SDL_AudioCallback callback = device->spec.callback;
+ SDL_AudioCallback callback = device->callbackspec.callback;
SDL_assert(device->iscapture);