Unable to specify parts

[NaruZosa]

Using -s or --parts fails, but download succeeds if parts aren't specified

C:\Users\Bradley>jncep epub https://j-novel.club/series/my-instant-death-ability-is-so-overpowered-no-one-in-this-other-world-stands-a-chance-against-me -s 9.6:9.8
Logged in with email 'jeansmyth141@gmail.com'
Use part specification '9.6:9.8'
Logout...
*** An unrecoverable error occured ***
'Volume' object has no attribute 'volume_num'

C:\Users\Bradley>jncep epub https://j-novel.club/series/my-instant-death-ability-is-so-overpowered-no-one-in-this-other-world-stands-a-chance-against-me --parts 9.6:9.8
Logged in with email 'jeansmyth141@gmail.com'
Use part specification '9.6:9.8'
Logout...
*** An unrecoverable error occured ***
'Volume' object has no attribute 'volume_num'

C:\Users\Bradley>jncep epub https://j-novel.club/series/my-instant-death-ability-is-so-overpowered-no-one-in-this-other-world-stands-a-chance-against-me
Logged in with email 'jeansmyth141@gmail.com'
Some of the requested parts are not available for reading!
Success! EPUB generated in 'C:\Users\Bradley\My_Instant_Death_Ability_Is_So_Overpowered_No_One_in_This_Other_World_Stands_a_Chance_Against_Me_Volumes_1_2_3_4_5_6_7_8_9_10_Parts_1_1_to_10_3.epub'!
Logout...

This worked in v26, unsure about v27.

[NaruZosa]

Cause found, patch submitted.

Thank you for the fantastic program :)

[NaruZosa]

Hmm. It used to be possible to specify part ranges, but this patch only fixes single part specification.

Part ranges downloads the whole volume instead (attempted with Instant Death parts 9.6:9.8).

Downloading 9.6 is successful, but 9.6:9.8 downloads the full volume.

[gvellut]

Thank you. I will merge your bugfix and will correct if necessary so all cases are handled.

[gvellut]

There is indeed a bug in the handling if the 2 sides of the parts have the same volume (as in 9.6:9.8)

[gvellut]

I made the fix. I will make a release soon.