[jdk17u-dev] RFR: 8276657: XSLT compiler tries to define a class with empty name

[Goetz Lindenmaier]

Simple fix to backport

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Commit messages:
 - Backport a093cdddaf5ab88eb84a147e523db5c3e1be54be

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/239/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=239&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276657
  Stats: 6 lines in 1 file changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/239.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/239/head:pull/239

PR: https://git.openjdk.java.net/jdk17u-dev/pull/239