git: openjdk/jdk: 8261290: Improve error message for NumberFormatException on null input

[Joe Darcy]

Changeset: 564011cf
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2021-02-21 18:43:26 +0000
URL:       https://git.openjdk.java.net/jdk/commit/564011cf

8261290: Improve error message for NumberFormatException on null input

Reviewed-by: attila, alanb

! src/java.base/share/classes/java/lang/Integer.java
! src/java.base/share/classes/java/lang/Long.java