Merge "Handle return value 0 from android_logger_list_read"

            // Read a message

            err = android_logger_list_read(loggers, &msg);

            if (err < 0) {

            // err = 0 - no content, unexpected connection drop or EOF.

            // err = +ive number - size of retrieved data from logger

            // err = -ive number, OS supplied error _except_ for -EAGAIN

            if (err <= 0) {

                fprintf(stderr, "logcat read failure: %s\n", strerror(err));

                break;

            }