Prevent overflow errors in integer lifts

[Cisphyx]

No description provided.

[codecov]

Codecov Report

Merging #1980 (7bdb581) into master (f2b4bd8) will decrease coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1980      +/-   ##
==========================================
- Coverage   96.75%   96.59%   -0.16%     
==========================================
  Files         146      146              
  Lines       27797    27815      +18     
==========================================
- Hits        26896    26869      -27     
- Misses        901      946      +45     

Flag	Coverage Δ
linux	96.59% <100.00%> (-0.16%)	⬇️
linux_replay	?

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Impacted Files	Coverage Δ
synapse/lib/layer.py	97.83% <100.00%> (-0.05%)	⬇️
synapse/tests/utils.py	93.59% <0.00%> (-2.18%)	⬇️
synapse/lib/spawn.py	96.47% <0.00%> (-0.97%)	⬇️
synapse/lib/hiveauth.py	95.96% <0.00%> (-0.77%)	⬇️
synapse/cortex.py	95.60% <0.00%> (-0.77%)	⬇️
synapse/lib/view.py	95.37% <0.00%> (-0.73%)	⬇️
synapse/lib/trigger.py	93.91% <0.00%> (-0.44%)	⬇️
synapse/lib/lmdbslab.py	99.39% <0.00%> (-0.21%)	⬇️

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