Fix typos.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@17927 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavutil/random_seed.h

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