[lworld] FYI: 8247309: [lworld] C1 crashes when compiling _defaultvalue referencing unresolved inline type

[Tobias Hartmann]

Should only cast to value klass after we've checked for unresolved klass.

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Commit messages:
 - 8247309: [lworld] C1 crashes when compiling _defaultvalue referencing unresolved inline type
 - Merge branch 'lworld' of https://github.com/TobiHartmann/valhalla into lworld
 - [lworld] Incorrect renaming of ValueFieldMaxFlat size in compiler tests

Changes: https://git.openjdk.java.net/valhalla/pull/73/files
 Webrev: https://webrevs.openjdk.java.net/valhalla/73/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8247309
  Stats: 46 lines in 2 files changed: 45 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/73.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/73/head:pull/73

PR: https://git.openjdk.java.net/valhalla/pull/73