configure.ac: Fix an omission during moving oggvorbis to decoder plugins.

configure.ac

@@ -969,14 +969,10 @@ fi
 AM_CONDITIONAL(HAVE_OGGFLAC, test x$enable_oggflac = xyes)
 
 dnl -------------------------------- Ogg Vorbis -------------------------------
-if test x$enable_tremor != xyes && test x$enable_vorbis = xyes; then
+if test x$enable_tremor != xno && test x$enable_vorbis = xyes; then
 	PKG_CHECK_MODULES(VORBIS, [ogg vorbis vorbisfile],
-		
-fi
-
-if test x$enable_vorbis = xyes; then
-	AC_DEFINE(ENABLE_VORBIS_DECODER, 1, [Define for Ogg Vorbis support]),
-			enable_vorbis=no)
+		AC_DEFINE(ENABLE_VORBIS_DECODER, 1, [Define for Ogg Vorbis support]),
+		enable_vorbis=no)
 fi
 
 AM_CONDITIONAL(ENABLE_VORBIS_DECODER, test x$enable_vorbis = xyes)