avcodec/aacps: Fix length of array in function definition

hybrid2_re() has a parameter declared as "const INTFLOAT filter[8]",
although the actual argument for said parameter only has seven elements;
the code itself only uses seven elements, so change the parameter.

Fixes a -Wstringop-overread warning with GCC 11.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/aacps.c

@@ -51,7 +51,8 @@ static void ipdopd_reset(int8_t *ipd_hist, int8_t *opd_hist)
 
 /** Split one subband into 2 subsubbands with a symmetric real filter.
  * The filter must have its non-center even coefficients equal to zero. */
-static void hybrid2_re(INTFLOAT (*in)[2], INTFLOAT (*out)[32][2], const INTFLOAT filter[8], int len, int reverse)
+static void hybrid2_re(INTFLOAT (*in)[2], INTFLOAT (*out)[32][2],
+                       const INTFLOAT filter[7], int len, int reverse)
 {
     int i, j;
     for (i = 0; i < len; i++, in++) {