Fix wrong buffer size computation for SDL audio. This led to borked sound in some

applications, and wrong timings in others.
http://bugzilla.libsdl.org/show_bug.cgi?id=1679

media-libs/libsdl/patches/libsdl-1.2-hg.patch

@@ -0,0 +1,18 @@
+--- libsdl-1.2-hg/src/audio/baudio/SDL_beaudio.cc   dim. nov. 04 19:07:49 2012 +0100
++++ b/src/audio/baudio/SDL_beaudio.cc   mar. janv. 01 22:41:22 2013 +0100
+@@ -199,11 +199,11 @@
+        return (-1);
+    }
+
+-    format.buffer_size = spec->samples;
+-
+	/* Calculate the final parameters for this audio specification */
+	SDL_CalculateAudioSpec(spec);
+
++    format.buffer_size = spec->size;
++
+	/* Subscribe to the audio stream (creates a new thread) */
+	{ sigset_t omask;
+		SDL_MaskSignals(&omask);
+         return (-1);
+     }