Avoid unsigned integer underflow on empty input.
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@ -2641,6 +2641,12 @@ measured_bw_line_parse(measured_bw_line_t *out, const char *orig_line)
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int got_node_id = 0;
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char *strtok_state; /* lame sauce d'jour */
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if (strlen(line) == 0) {
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log_warn(LD_DIRSERV, "Empty line in bandwidth file");
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tor_free(line);
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return -1;
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}
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/* Remove end of line character, so that is not part of the token */
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if (line[strlen(line) - 1] == '\n') {
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line[strlen(line) - 1] = '\0';
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