tests: simple-encoder: fix build warnings on 64-bit platforms.

Add a cosmetic change to replace VAAPI buffer with VA buffer and most
importantly fix warnings spitted out during build on 64-bit platforms.

../../tests/simple-encoder.c:211:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘gssize’ [-Wformat=]
     g_warning ("Invalid VAAPI buffer size (%d)", size);
     ^
../../tests/simple-encoder.c:217:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘gssize’ [-Wformat=]
     g_warning ("Failed to create output buffer of size %d", size);
     ^

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/simple-encoder.c b/tests/simple-encoder.c
index 1a6f32c5..ff9ddcbe 100644
--- a/tests/simple-encoder.c
+++ b/tests/simple-encoder.c
@@ -208,18 +208,18 @@ allocate_buffer (GstVaapiCodedBuffer * vbuf)
 
   size = gst_vaapi_coded_buffer_get_size (vbuf);
   if (size <= 0) {
-    g_warning ("Invalid VAAPI buffer size (%d)", size);
+    g_warning ("Invalid VA buffer size (%zd)", size);
     return NULL;
   }
 
   buf = gst_buffer_new_and_alloc (size);
   if (!buf) {
-    g_warning ("Failed to create output buffer of size %d", size);
+    g_warning ("Failed to create output buffer of size %zd", size);
     return NULL;
   }
 
   if (!gst_vaapi_coded_buffer_copy_into (buf, vbuf)) {
-    g_warning ("Failed to copy VAAPI buffer data");
+    g_warning ("Failed to copy VA buffer data");
     gst_buffer_unref (buf);
     return NULL;
   }