* Move the conditional compilation of bg_lib.c from the Makefile to cpp in

order to force dependency generation on bg_lib.*
* Make testing USE_ defines more consistent

code/client/snd_codec.c

@@ -102,7 +102,7 @@ void S_CodecInit()
 {
 	codecs = NULL;
 	S_CodecRegister(&wav_codec);
-#if USE_CODEC_VORBIS
+#ifdef USE_CODEC_VORBIS
 	S_CodecRegister(&ogg_codec);
 #endif
 }