[9] RFR(XS): 8180576: Null pointer dereference in Matcher::xform()

[Tobias Hartmann]

Hi,

please review the following patch:
https://bugs.openjdk.java.net/browse/JDK-8180576
http://cr.openjdk.java.net/~thartmann/8180576/webrev.00/

Fixed a missing null check on n->in(0) found by Parfait.

Thanks,
Tobias