fix: proper checking of err pointer nil

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

x/evm/keeper/keeper.go

@@ -133,7 +133,7 @@ func HandleOutOfGasPanic(err *error, format string) func() {
 				panic(r)
 			}
 		}
-		if *err != nil && format != "" {
+		if err != nil && *err != nil && format != "" {
 			*err = fmt.Errorf("%s: %w", format, *err)
 		}
 	}