dbus: fix -Wformat in near_dbus_encode_string()

Fix GCC warning:

    src/dbus.c: In function ‘near_dbus_encode_string’:
    src/dbus.c:71:37: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 3 has type ‘int’ [-Werror=format=]
       71 |    g_string_append_printf(str, "_%02x", tmp);
          |                                  ~~~^   ~~~
          |                                     |   |
          |                                     |   int
          |                                     unsigned int
          |                                  %02x

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/dbus.c b/src/dbus.c
index 9c67a9e..ed4570d 100644
--- a/src/dbus.c
+++ b/src/dbus.c
@@ -68,7 +68,7 @@ char *near_dbus_encode_string(const char *value)
 		const char tmp = value[i];
 		if ((tmp < '0' || tmp > '9') && (tmp < 'A' || tmp > 'Z') &&
 						(tmp < 'a' || tmp > 'z'))
-			g_string_append_printf(str, "_%02x", tmp);
+			g_string_append_printf(str, "_%02x", (unsigned int)tmp);
 		else
 			str = g_string_append_c(str, tmp);
 	}