error codes not hex formatted (IDFGH-11071)

[rottaran]

The diskio implementation outputs error codes as decimal numbers, for example 257. These cannot be found with internet search, because the ESP-IDF documentation uses hexadecimal coding, for example 0x101. For instance in

esp-idf/components/fatfs/diskio/diskio_sdmmc.c

Line 68 in 2bc1f2f

ESP_LOGE(TAG, "sdmmc_write_blocks failed (%d)", err);

This makes diagnostics more difficult than necessary.

[Alvin1Zhang]

Thanks for reporting, fix is available 590ebd3, feel free to reopen.