compiler: Patch buffer initialization

[FabioLuporini]

fixes #1915

[codecov]

Codecov Report

Merging #1916 (0bf9614) into master (ee11391) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1916   +/-   ##
=======================================
  Coverage   89.64%   89.65%           
=======================================
  Files         211      211           
  Lines       35634    35648   +14     
  Branches     5369     5369           
=======================================
+ Hits        31945    31960   +15     
  Misses       3189     3189           
+ Partials      500      499    -1     

Impacted Files	Coverage Δ
devito/passes/clusters/buffering.py	94.90% <100.00%> (+0.01%)	⬆️
tests/test_buffering.py	98.57% <100.00%> (+0.04%)	⬆️
devito/ir/support/space.py	89.21% <0.00%> (+0.20%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ee11391...0bf9614. Read the comment docs.