libcamera_client: 64-bit compile issue

- size_t print format
- some unused parameter warning messages

Change-Id: I2c0f50dda7e810f3f60603fd9d8c62c5b8767528
diff --git a/camera/CameraBase.cpp b/camera/CameraBase.cpp
index 55376b0..04694cd 100644
--- a/camera/CameraBase.cpp
+++ b/camera/CameraBase.cpp
@@ -49,7 +49,7 @@
         DeathNotifier() {
         }
 
-        virtual void binderDied(const wp<IBinder>& who) {
+        virtual void binderDied(const wp<IBinder>& /*who*/) {
             ALOGV("binderDied");
             Mutex::Autolock _l(gLock);
             gCameraService.clear();
@@ -153,7 +153,7 @@
 }
 
 template <typename TCam, typename TCamTraits>
-void CameraBase<TCam, TCamTraits>::binderDied(const wp<IBinder>& who) {
+void CameraBase<TCam, TCamTraits>::binderDied(const wp<IBinder>& /*who*/) {
     ALOGW("mediaserver's remote binder Camera object died");
     notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, /*ext2*/0);
 }