examples: fix IPv6 bounds check

[AnnaShaleva]

Refs. neo-project/non-native-contracts#3

[codecov]

Codecov Report

Merging #1969 (2a9ce03) into master (2eb9106) will increase coverage by 0.64%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1969      +/-   ##
==========================================
+ Coverage   83.06%   83.70%   +0.64%     
==========================================
  Files         285      285              
  Lines       22963    23990    +1027     
==========================================
+ Hits        19074    20082    +1008     
- Misses       2707     2709       +2     
- Partials     1182     1199      +17     

Impacted Files	Coverage Δ
pkg/core/native/std.go	96.02% <0.00%> (-0.63%)	⬇️
pkg/compiler/inline.go	100.00% <0.00%> (ø)
pkg/compiler/func_scope.go	100.00% <0.00%> (ø)
pkg/interop/native/neo/neo.go	0.00% <0.00%> (ø)
pkg/interop/native/std/std.go	0.00% <0.00%> (ø)
pkg/compiler/analysis.go	97.80% <0.00%> (+0.49%)	⬆️
pkg/vm/contract_checks.go	83.49% <0.00%> (+1.94%)	⬆️
pkg/rpc/request/txBuilder.go	98.97% <0.00%> (+2.38%)	⬆️
pkg/compiler/codegen.go	95.41% <0.00%> (+3.53%)	⬆️
pkg/core/native/native_neo.go	76.22% <0.00%> (+5.43%)	⬆️
... and 2 more

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[roman-khimov]

Waiting for neo-project/non-native-contracts#3 to settle.