[sctp] Include buffer size in ErrShortBuffer

[melekes]

Refs #273

[codecov]

Codecov Report

Patch coverage: 50.00% and project coverage change: -0.02 ⚠️

Comparison is base (8168625) 61.50% compared to head (3cae751) 61.49%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #456      +/-   ##
==========================================
- Coverage   61.50%   61.49%   -0.02%     
==========================================
  Files         537      537              
  Lines       49505    49506       +1     
  Branches    12331    12331              
==========================================
- Hits        30447    30442       -5     
- Misses       9875     9882       +7     
+ Partials     9183     9182       -1     

Impacted Files	Coverage Δ
sctp/src/association/association_test.rs	59.78% <0.00%> (ø)
sctp/src/queue/queue_test.rs	65.00% <0.00%> (ø)
sctp/src/error.rs	46.15% <100.00%> (+4.48%)	⬆️
sctp/src/queue/reassembly_queue.rs	92.13% <100.00%> (ø)

... and 4 files with indirect coverage changes

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[k0nserv]

I'm not active in this project anymore @melekes.

Maybe @rainliu or @yngrtc can help