audio_server: binder: fix compiling issue for 64bit

PD#SWPL-128344

Problem:
ssize_t is different bit length on 32bit and 64bit.

Solution:
Use correct type

Verify:
Yotco + AH212

Change-Id: I148e55cfccf6d9002fcf55e6eb260b454ab362cc
Signed-off-by: Song Zhao <song.zhao@amlogic.com>
1 file changed
tree: f3db57f1de1c0df5103bcc72b7d362ac00d1231f
  1. include/
  2. src/
  3. Makefile