Use correct bit width for spaceEscrow and spaceXRPUChannels when hashing

[seelabs]

No description provided.

[wilsonianb]

👍
especially with commit message in
#2072

[codecov-io]

Codecov Report

Merging #2071 into develop will decrease coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #2071      +/-   ##
===========================================
- Coverage    68.54%   68.53%   -0.01%     
===========================================
  Files          679      679              
  Lines        49554    49554              
===========================================
- Hits         33965    33962       -3     
- Misses       15589    15592       +3

Impacted Files	Coverage Δ
src/ripple/protocol/impl/Indexes.cpp	92.63% <100%> (ø)	⬆️
src/ripple/basics/DecayingSample.h	77.77% <0%> (-8.34%)	⬇️
src/ripple/beast/asio/io_latency_probe.h	97.01% <0%> (-1.5%)	⬇️
src/ripple/app/tx/impl/PayChan.cpp	91.7% <0%> (-0.49%)	⬇️
src/ripple/app/ledger/impl/LedgerMaster.cpp	44.26% <0%> (+0.22%)	⬆️

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