This causes compiler errors in some setups otherwise, e.g.:
CC libsigrokdecode_la-session.lo
session.c: In function 'srd_session_metadata_set':
session.c:195:46: error: expected ')' before 'PRIu64'
srd_dbg("Setting session %d samplerate to %"PRIu64".",
^
session.c: In function 'srd_session_send':
session.c:242:15: error: expected ')' before 'PRIu64'
"number %" PRIu64 ", %" PRIu64 " bytes at 0x%p",
^
#include "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include "libsigrokdecode-internal.h"
#include "config.h"
+#include <inttypes.h>
#include <glib.h>
/**