fix some gcc warnings (#73) * tweak string size fix gcc8 warnings ``` svr-agentfwd.c: In function 'bindagent': svr-agentfwd.c:254:53: warning: '%s' directive output may be truncated writing up to 107 bytes into a region of size between 0 and 107 [-Wformat-truncation=] snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", path, sockfile); ^~ ~~~~~~~~ svr-agentfwd.c:254:2: note: 'snprintf' output between 2 and 216 bytes into a destination of size 108 snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", path, sockfile); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` * cleanup signed/unsigned comparison fix gcc8 warnings ``` scp.c: In function 'do_local_cmd': scp.c:132:17: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare] for (i = 0; i < a->num; i++) ^ scpmisc.c: In function 'addargs': scpmisc.c:161:25: warning: comparison of integer expressions of different signedness: 'int' and 'u_int' {aka 'unsigned int'} [-Wsign-compare] } else if (args->num+2 >= nalloc) ^~ scpmisc.c: In function 'replacearg': scpmisc.c:183:12: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare] if (which >= args->num) ^~ scpmisc.c: In function 'freeargs': scpmisc.c:196:17: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare] for (i = 0; i < args->num; i++) ^ ``` see https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/misc.h.diff?r1=1.16&r2=1.17

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 */
/* test the ciphers and hashes using their built-in self-tests */

#include <tomcrypt_test.h>

int cipher_hash_test(void)
{
   int           x;

   /* test ciphers */
   for (x = 0; cipher_descriptor[x].name != NULL; x++) {
      DOX(cipher_descriptor[x].test(), cipher_descriptor[x].name);
   }

   /* stream ciphers */
#ifdef LTC_CHACHA
   DO(chacha_test());
#endif
#ifdef LTC_RC4_STREAM
   DO(rc4_stream_test());
#endif
#ifdef LTC_SOBER128_STREAM
   DO(sober128_stream_test());
#endif

   /* test hashes */
   for (x = 0; hash_descriptor[x].name != NULL; x++) {
      DOX(hash_descriptor[x].test(), hash_descriptor[x].name);
   }

   /* SHAKE128 + SHAKE256 tests are a bit special */
   DOX(sha3_shake_test(), "sha3_shake");

   return 0;
}

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/* git commit:  $Format:%H$ */
/* commit time: $Format:%ai$ */