Fix .deb builds

The code triggers following error:
abisip-find.c:317:3: error: format not a string literal and no format
arguments [-Werror=format-security]

The error was introduced in 5bf1e15c55.

Change-Id: I613781495edbc53916ca70ff7b78d28ffabd3f5d

src/ipaccess/abisip-find.c

@@ -312,12 +312,8 @@ static void handle_response(unsigned char *buf, int len)
 		base_stations_bump(changed);
 		printf("RX: %u   \r", responses);
 		fflush(stdout);
-	} else {
-		char *line = parse_response(ctx, buf, len);
-		printf(line);
-		printf("\n");
-		talloc_free(line);
-	}
+	} else
+		printf("%s\n", parse_response(ctx, buf, len));
 }
 
 static int read_response(int fd)