Add necessary header for LIBAVUTIL_VERSION_MAJOR, fixes the warning:

libavutil/lzo.c:235:5: warning: "LIBAVUTIL_VERSION_MAJOR" is not defined

Originally committed as revision 16962 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/lzo.c

@@ -18,6 +18,8 @@
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
+
+#include "avutil.h"
 #include "common.h"
 //! Avoid e.g. MPlayers fast_memcpy, it slows things down here.
 #undef memcpy