typo

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@9121 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

tests/audiogen.c

 /*
  * Generates a synthetic stereo sound
- * NOTE: no floats are used to guaranty a bit exact output.
+ * NOTE: No floats are used to guarantee a bit exact output.
  *
  * Copyright (c) 2002 Fabrice Bellard
  *

tests/videogen.c

 /*
  * Generates a synthetic YUV video sequence suitable for codec testing.
- * NOTE: no floats are used to guaranty a bit exact output.
+ * NOTE: No floats are used to guarantee a bit exact output.
  *
  * Copyright (c) 2002 Fabrice Bellard
  *