utils: fix initialization of dot_alpn

src/utils/common/tls.c

@@ -33,11 +33,8 @@
 #include "contrib/base64.h"
 #include "libknot/errcode.h"
 
-#define DOT_ALPN "\x03""dot"
-
 const gnutls_datum_t dot_alpn = {
-	.data = (unsigned char *)&(DOT_ALPN[1]),
-	.size = DOT_ALPN[0]
+	(unsigned char *)"dot", 3
 };
 
 void tls_params_init(tls_params_t *params)