gst/speed/gstspeed.c: Fix buffer overflow (#172281).

Original commit message from CVS:
* gst/speed/gstspeed.c: (speed_chain):
Fix buffer overflow (#172281).

ChangeLog

+2005-04-02  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
+
+	* gst/speed/gstspeed.c: (speed_chain):
+	  Fix buffer overflow (#172281).
+
 2005-04-01  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
 
 	* gst/playback/gstplaybin.c: (gst_play_bin_class_init),

gst/speed/gstspeed.c

@@ -489,7 +489,10 @@ speed_chain (GstPad * pad, GstData * data)
 
   in_buf = GST_BUFFER (data);
 
+  /* buffersize has to be aligned by samplesize */
   out_size = ceil ((gfloat) GST_BUFFER_SIZE (in_buf) / filter->speed);
+  out_size = (filter->sample_size * (out_size + filter->sample_size - 1)) /
+      filter->sample_size;
   out_buf = gst_pad_alloc_buffer (filter->srcpad, -1, out_size);
 
   in_samples = GST_BUFFER_SIZE (in_buf) / filter->sample_size;