Monkey's Audio decoder vector functions work on input with length

a multiple of 16. Reflect that fact in the documentation for them.

Originally committed as revision 14148 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/dsputil.h

@@ -454,17 +454,17 @@ typedef struct DSPContext {
     /* ape functions */
     /**
      * Add contents of the second vector to the first one.
-     * @param len length of vectors, should be multiple of 8
+     * @param len length of vectors, should be multiple of 16
      */
     void (*add_int16)(int16_t *v1/*align 16*/, int16_t *v2, int len);
     /**
      * Add contents of the second vector to the first one.
-     * @param len length of vectors, should be multiple of 8
+     * @param len length of vectors, should be multiple of 16
      */
     void (*sub_int16)(int16_t *v1/*align 16*/, int16_t *v2, int len);
     /**
      * Calculate scalar product of two vectors.
-     * @param len length of vectors, should be multiple of 8
+     * @param len length of vectors, should be multiple of 16
      * @param shift number of bits to discard from product
      */
     int32_t (*scalarproduct_int16)(int16_t *v1, int16_t *v2/*align 16*/, int len, int shift);