add multiple inclusion guards to headers

Originally committed as revision 9345 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 5 insertions, 0 deletions

diff --git a/libavcodec/dvdata.h b/libavcodec/dvdata.h
index 4484933a01..f493da1be7 100644
--- a/libavcodec/dvdata.h
+++ b/libavcodec/dvdata.h
@@ -24,6 +24,9 @@
  * Constants for DV codec.
  */
 
+#ifndef AVCODEC_DVDATA_H
+#define AVCODEC_DVDATA_H
+
 #include "avcodec.h"
 #include "rational.h"
 
@@ -2725,3 +2728,5 @@ static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
     buf[2] = 0xff;             /* reserved -- always 1 */
     return 3;
 }
+
+#endif