Global styles: Fix error when updating padding input in global styles (…

…#49465)

* Fix padding input in global styles

* Add tests

---------

Co-authored-by: Daniel Richards <daniel.richards@automattic.com>

packages/block-editor/src/utils/object.js

@@ -27,7 +27,7 @@ function normalizePath( path ) {
  * @return {*} Cloned object, or original literal non-object value.
  */
 function cloneObject( object ) {
-	if ( typeof object === 'object' ) {
+	if ( object && typeof object === 'object' ) {
 		return {
 			...Object.fromEntries(
 				Object.entries( object ).map( ( [ key, value ] ) => [

packages/block-editor/src/utils/test/object.js

@@ -84,6 +84,44 @@ describe( 'immutableSet', () => {
 				} );
 			} );
 		} );
+
+		describe( 'for nested falsey values', () => {
+			it( 'overwrites undefined values', () => {
+				const result = immutableSet( { test: undefined }, 'test', 1 );
+
+				expect( result ).toEqual( { test: 1 } );
+			} );
+
+			it( 'overwrites null values', () => {
+				const result = immutableSet( { test: null }, 'test', 1 );
+
+				expect( result ).toEqual( { test: 1 } );
+			} );
+
+			it( 'overwrites false values', () => {
+				const result = immutableSet( { test: false }, 'test', 1 );
+
+				expect( result ).toEqual( { test: 1 } );
+			} );
+
+			it( 'overwrites `0` values', () => {
+				const result = immutableSet( { test: 0 }, 'test', 1 );
+
+				expect( result ).toEqual( { test: 1 } );
+			} );
+
+			it( 'overwrites empty string values', () => {
+				const result = immutableSet( { test: '' }, 'test', 1 );
+
+				expect( result ).toEqual( { test: 1 } );
+			} );
+
+			it( 'overwrites NaN values', () => {
+				const result = immutableSet( { test: NaN }, 'test', 1 );
+
+				expect( result ).toEqual( { test: 1 } );
+			} );
+		} );
 	} );
 
 	describe( 'does not mutate the original object', () => {