fix add missing nil check in store.GetStore (come from https://github.com…

[BananaLF]

…/cosmos/cosmos-sdk/pull/9354 )

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Reviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[codecov-commenter]

Codecov Report

Merging #2246 (bcd5b2c) into dev (3ae1aa1) will decrease coverage by 2.83%.
The diff coverage is n/a.

❗ Current head bcd5b2c differs from pull request most recent head f290126. Consider uploading reports for the commit f290126 to get more accurate results

@@            Coverage Diff             @@
##              dev    #2246      +/-   ##
==========================================
- Coverage   34.69%   31.86%   -2.84%     
==========================================
  Files         337       50     -287     
  Lines       38501     4805   -33696     
==========================================
- Hits        13358     1531   -11827     
+ Misses      24138     3115   -21023     
+ Partials     1005      159     -846     

Impacted Files	Coverage Δ
x/staking/types/msg.go
x/erc20/types/proposal.go
x/evm/types/bloombits.go
x/wasm/client/utils/client_adapter.go
x/evm/watcher/marshal.go
x/wasm/types/params.go
x/erc20/keeper/ibc.go
x/erc20/keeper/proposal.go
x/distribution/keeper/invariants.go
x/wasm/keeper/m1compat.go
... and 277 more

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