compiler: Fix update_properties

[FabioLuporini]

Triggered by a test in PRO

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 87.52%. Comparing base (f854b0c) to head (9a21ec2).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
devito/ir/support/properties.py	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2548      +/-   ##
==========================================
+ Coverage   78.42%   87.52%   +9.09%     
==========================================
  Files         238      238              
  Lines       47033    47034       +1     
  Branches     4144     4144              
==========================================
+ Hits        36886    41165    +4279     
+ Misses       9395     5176    -4219     
+ Partials      752      693      -59     

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