etmsync Pirelli IMEI retrieval: fix poor use of printf() Bug reported by Vadim Yanitskiy <fixeria@osmocom.org>: the construct where a static-allocated string was passed to printf() without any format arguments causes newer compilers to report a security problem. Given that formatted output is not needed here, just fixed string output, change printf() to fputs(), and direct the error message to stderr while at it.

/*
 * Definitions for the RVT MUX over-the-wire protocol
 */

#define	STX	0x02
#define	DLE	0x10

#define RVT_RV_HEADER        0x11
#define RVT_L1_HEADER        0x12
#define RVT_L23_HEADER       0x13
#define RVT_TM_HEADER        0x14
#define RVT_RNET_HEADER      0x15
#define RVT_PROF_HEADER      0x16
#define RVT_GTTBACK_HEADER   0x17
#define RVT_OTHER_HEADER     0x18
#define RVT_INVALID_HEADER   0xFF