Bug 539 (P2) - Audacity does not build if configured --without-ffmpeg

more pinpointed fix that should close this

src/ondemand/ODDecodeFFmpegTask.cpp

@@ -1,11 +1,16 @@
-/*
- *  ODDecodeFFmpegTask.cpp
- *  Audacity
- *
- *  Created by apple on 3/8/10.
- *  Copyright 2010 __MyCompanyName__. All rights reserved.
- *
- */
+/**********************************************************************
+
+   Audacity: A Digital Audio Editor
+   Audacity(R) is copyright (c) 1999-2012 Audacity Team.
+   License: GPL v2.  See License.txt.
+
+   ODDecodeFFmpegTask.cpp
+   Michael Chinen
+
+******************************************************************/
+
+#ifdef USE_FFMPEG
+
 #include <wx/wxprec.h>
  #include "../Experimental.h" 
 // For compilers that support precompilation, includes "wx/wx.h".
@@ -655,4 +660,4 @@ void ODFFmpegDecoder::InsertCache(FFMpegDecodeCache* cache) {
 }
 #endif
 
-
+#endif // USE_FFMPEG

src/ondemand/ODDecodeFFmpegTask.h

@@ -1,14 +1,19 @@
-/*
- *  ODDecodeFFmpegTask.h
- *  Audacity
- *
- *  Created by apple on 3/8/10.
- *  Copyright 2010 __MyCompanyName__. All rights reserved.
- *
- */
- #include "../Experimental.h"
- 
- #ifdef EXPERIMENTAL_OD_FFMPEG
+/**********************************************************************
+
+   Audacity: A Digital Audio Editor
+   Audacity(R) is copyright (c) 1999-2012 Audacity Team.
+   License: GPL v2.  See License.txt.
+
+   ODDecodeFFmpegTask.h
+   Michael Chinen
+
+******************************************************************/
+
+#ifdef USE_FFMPEG
+
+#include "../Experimental.h"
+
+#ifdef EXPERIMENTAL_OD_FFMPEG
 
 #ifndef __ODDECODEFFMPEGTASK__
 #define __ODDECODEFFMPEGTASK__
@@ -45,4 +50,6 @@ class ODDecodeFFmpegTask:public ODDecodeTask
 };
 #endif //__ODDECODEFFMPEGTASK__
 
-#endif //EXPERIMENTAL_OD_FFMPEG
+#endif //EXPERIMENTAL_OD_FFMPEG
+
+#endif // USE_FFMPEG