posix: detect unknown metadata blocks

[marcinslusarz]

... and fix indentation

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This change is 

[krzycz]

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Reviewed 1 of 1 files at r1. Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable

[codecov[bot]]

Codecov Report

Merging #382 into master will increase coverage by 0.11%. The diff coverage is 72.72%.

@@            Coverage Diff             @@
##           master     #382      +/-   ##
==========================================
+ Coverage   76.91%   77.02%   +0.11%     
==========================================
  Files          67       67              
  Lines        8261     8262       +1     
  Branches     1658     1658              
==========================================
+ Hits         6354     6364      +10     
+ Misses       1489     1487       -2     
+ Partials      418      411       -7

Flag	Coverage Δ
#ltp_tests	46.53% <0%> (+0.85%)	:arrow_up:
#sqlite_tests	45.26% <0%> (+0.01%)	:arrow_up:
#tests_antool	14.71% <0%> (-0.01%)	:arrow_down:
#tests_posix_multi_threaded	25.11% <54.54%> (+0.02%)	:arrow_up:
#tests_posix_single_threaded	54.28% <72.72%> (-0.04%)	:arrow_down:
#tests_preload	44.76% <0%> (-0.04%)	:arrow_down:

Impacted Files	Coverage Δ
src/libpmemfile-posix/stats.c	56.09% <72.72%> (-1.41%)	:arrow_down:
src/libpmemfile-posix/fcntl.c	66.03% <0%> (-3.78%)	:arrow_down:
src/libpmemfile-posix/dir.c	85.99% <0%> (+0.98%)	:arrow_up:
src/libpmemfile-posix/data.c	94.82% <0%> (+1.19%)	:arrow_up:
src/libpmemfile-posix/block_array.c	96.77% <0%> (+2.41%)	:arrow_up:
src/libpmemfile-posix/blocks.c	70% <0%> (+5%)	:arrow_up:

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[sarahjelinek]

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Review status: all files reviewed at latest revision, all discussions resolved, some commit checks failed.

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Comments from Reviewable