vaapi-recorder: Fix allocator sizeof operand mismatch

Result of 'calloc' is converted to a pointer of type 'unsigned int', which is
incompatible with sizeof operand type 'int'

Signed-off-by: Lucas Tanure <tanure@linux.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>

src/vaapi-recorder.c

@@ -141,7 +141,7 @@ static void
 bitstream_start(struct bitstream *bs)
 {
 	bs->max_size_in_dword = BITSTREAM_ALLOCATE_STEPPING;
-	bs->buffer = calloc(bs->max_size_in_dword * sizeof(int), 1);
+	bs->buffer = calloc(bs->max_size_in_dword * sizeof(unsigned int), 1);
 	bs->bit_offset = 0;
 }