fix: nil pointer panic on NewIntFromBigInt (backport cosmos#9627) (c…

…osmos#10845)

* types: fix nil pointer panic on `NewIntFromBigInt` (cosmos#9627)

(cherry picked from commit 7f90374)

* fix conflicts

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Aleksandr Bezobchuk <aleks.bezobchuk@gmail.com>

CHANGELOG.md

@@ -50,6 +50,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (types) [\#9627](https://github.com/cosmos/cosmos-sdk/pull/9627) Fix nil pointer panic on `NewBigIntFromInt`.
 * [#10725](https://github.com/cosmos/cosmos-sdk/pull/10725) populate `ctx.ConsensusParams` for begin/end blockers.
 
 ## [v0.44.5](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.44.5) - 2021-12-02

math/int_test.go

@@ -94,6 +94,9 @@ func (s *intTestSuite) TestIntPanic() {
 	s.Require().NotPanics(func() { math.NewIntFromBigInt(nil) })
 	s.Require().True(math.NewIntFromBigInt(nil).IsNil())
 
+	s.Require().NotPanics(func() { sdk.NewIntFromBigInt(nil) })
+	s.Require().True(sdk.NewIntFromBigInt(nil).IsNil())
+
 	// Division-by-zero check
 	s.Require().Panics(func() { i1.Quo(math.NewInt(0)) })