Add multiple inclusion guards.

Originally committed as revision 10732 to svn://svn.ffmpeg.org/ffmpeg/trunk
18 years ago · d02f15476f
parent c1d5a67c56
commit d02f15476f
1 changed files with 5 additions and 0 deletions
--- a/libavutil/rc4.h
+++ b/libavutil/rc4.h
@ -18,4 +18,9 @@
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

+#ifndef RC4_H
+#ifndef RC4_H
+
 void ff_rc4_enc(const uint8_t *key, int keylen, uint8_t *data, int datalen);
+
+#endif /* RC4_H */