sniff: ensure the checksum error flag is also printed

the firmware now also use a generic value_string array (as does the
host application)

Change-Id: I861bd8b52e8f2f2a4786bbe1cc834917119dc394

host/simtrace2-sniff.c

@@ -131,14 +131,14 @@ const struct value_string data_flags[] = {
 		.value = SNIFF_DATA_FLAG_ERROR_MALFORMED,
 		.str = "malformed",
 	},
-	{
-		.value = 0,
-		.str = NULL,
-	},
 	{
 		.value = SNIFF_DATA_FLAG_ERROR_CHECKSUM,
 		.str = "checksum error",
 	},
+	{
+		.value = 0,
+		.str = NULL,
+	},
 };
 
 static void print_flags(const struct value_string* flag_meanings, uint32_t nb_flags, uint32_t flags) {