Fix typo: 'conjuction' -> 'conjunction'.

Originally committed as revision 17989 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/random_seed.h

@@ -24,7 +24,7 @@
 #include <stdint.h>
 
 /**
- * Gets a seed to use in conjuction with random functions.
+ * Gets a seed to use in conjunction with random functions.
  */
 uint32_t ff_random_get_seed(void);