[PATCH v2 05/13] hw/mips/malta: Replace sprintf() by snprintf()

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

sprintf() is deprecated on Darwin since macOS 13.0 / XCode 14.1,
resulting in painful developper experience.

Replace sprintf() by snprintf() in order to avoid:

  [120/169] Compiling C object libcommon.fa.p/system_qtest.c.o
  hw/mips/malta.c:860:9: warning: 'sprintf' is deprecated:
          sprintf(rng_seed_hex + i * 2, "%02x", rng_seed[i]);
          ^
    This function is provided for compatibility reasons only.
    Due to security concerns inherent in the design of sprintf(3),
    it is highly recommended that you use snprintf(3) instead.
    [-Wdeprecated-declarations]

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/mips/malta.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/mips/malta.c b/hw/mips/malta.c
index 9fc6a7d313..5d33aa5123 100644
--- a/hw/mips/malta.c
+++ b/hw/mips/malta.c
@@ -857,7 +857,8 @@ static char *rng_seed_hex_new(void)
 
     qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed));
     for (size_t i = 0; i < sizeof(rng_seed); ++i) {
-        sprintf(rng_seed_hex + i * 2, "%02x", rng_seed[i]);
+        snprintf(rng_seed_hex + i * 2, sizeof(rng_seed_hex) - i * 2,
+                 "%02x", rng_seed[i]);
     }
 
     return g_strdup(rng_seed_hex);
-- 
2.41.0