Fixed issue where using DV Time there would be a fatal error in an ask query

[YvarRavy]

Fixes #988

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 45.09%. Comparing base (2a94978) to head (a718104).

Files with missing lines	Patch %	Lines
src/Graph/GraphPrinter.php	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #989   +/-   ##
=========================================
  Coverage     45.09%   45.09%           
  Complexity     2422     2422           
=========================================
  Files            81       81           
  Lines          9197     9197           
=========================================
  Hits           4147     4147           
  Misses         5050     5050           

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