Updated getfat variables size

[marcsit]

I found a bug in the getfat_c wrapper, concerning the default length for the typelen argument; it is set to 4, that leads to a three letter truncation and ‘SCLK’ is truncated to ‘SCL’.

The correction updates the lenght of the arclen and typlen variables to 5 to accomodate a 4 character string.

Tests have been updated accordingly.

[codecov]

Codecov Report

Merging #420 (e2a25f7) into main (f0550b6) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #420   +/-   ##
=======================================
  Coverage   99.87%   99.87%           
=======================================
  Files          12       12           
  Lines       14747    14750    +3     
=======================================
+ Hits        14729    14732    +3     
  Misses         18       18           

Impacted Files	Coverage Δ
spiceypy/spiceypy.py	99.69% <100.00%> (ø)
spiceypy/tests/test_wrapper.py	100.00% <100.00%> (ø)

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[AndrewAnnex]

thanks @marcsit! looks good and tests passed so I'll go ahead and merge!