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only convert if there actually was a hexstring
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@ -278,7 +278,7 @@ uint64_t arg_get_u64_hexstr_def(CLIParserContext *ctx, uint8_t paramnum, uint64_
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uint8_t data[8];
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int datalen = 0;
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int res = CLIParamHexToBuf(arg_get_str(ctx, paramnum), data, sizeof(data), &datalen);
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if (res == 0) {
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if (res == 0 && datalen > 0) {
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for (uint8_t i = 0; i < datalen; i++) {
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rv <<= 8;
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rv |= data[i];
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