compiler: Further minor tweaks

[FabioLuporini]

No description provided.

[FabioLuporini]

simply, this now behaves just like reads a few lines above

[codecov]

Codecov Report

Merging #1796 (a25c8c6) into master (6159e32) will increase coverage by 7.47%.
The diff coverage is 80.00%.

❗ Current head a25c8c6 differs from pull request most recent head 56081ac. Consider uploading reports for the commit 56081ac to get more accurate results

@@            Coverage Diff             @@
##           master    #1796      +/-   ##
==========================================
+ Coverage   78.12%   85.60%   +7.47%     
==========================================
  Files         209      204       -5     
  Lines       34131    33523     -608     
  Branches     4446     4387      -59     
==========================================
+ Hits        26665    28697    +2032     
+ Misses       6923     4309    -2614     
+ Partials      543      517      -26     

Impacted Files	Coverage Δ
devito/ir/support/utils.py	88.07% <50.00%> (-1.84%)	⬇️
devito/symbolics/extended_sympy.py	95.89% <77.77%> (+5.05%)	⬆️
devito/ir/support/basic.py	91.92% <80.00%> (+0.22%)	⬆️
devito/ir/iet/nodes.py	92.53% <100.00%> (+3.24%)	⬆️
devito/symbolics/printer.py	74.11% <100.00%> (+1.49%)	⬆️
tests/test_pickle.py	99.55% <100.00%> (+16.62%)	⬆️
tests/test_gpu_openmp.py	4.51% <0.00%> (-87.01%)	⬇️
tests/test_adjoint.py	26.66% <0.00%> (-73.34%)	⬇️
examples/seismic/tti/operators.py	53.94% <0.00%> (-43.16%)	⬇️
examples/seismic/self_adjoint/operators.py	58.46% <0.00%> (-41.54%)	⬇️
... and 97 more

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