set handlingResultNonInt null

[yueyufei]

When I used org.springframework.shell.Shell and wrote a command list-bean --package-prefix org.springframework.boot.autoconfigure.context to print all bean objects under the package path, I mistakenly wrote it as list-bean --package-prefix=org.springframework.boot.autoconfigure.context, which resulted in an error. Even after correcting the command, there was still an error. The reason was that handlingResultNonInt was not set to null