[jdk17u-dev] RFR: 8305088: SIGSEGV in Method::is_method_handle_intrinsic

[Martin Doerr]

I had forgotten a null check when backporting [JDK-8295724](https://bugs.openjdk.org/browse/JDK-8295724). Unlike head, JDK17u uses `set_method(NULL)` in `nmethod::make_unloaded()` (and `nmethod::make_not_entrant_or_zombie`). We shouldn't ask `can_be_allocated_in_NonNMethod_space()` in these cases. The nmethod can't be a method handle intrinsic.

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Commit messages:
 - 8305088: SIGSEGV in Method::is_method_handle_intrinsic

Changes: https://git.openjdk.org/jdk17u-dev/pull/1330/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1330&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305088
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1330.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1330/head:pull/1330

PR: https://git.openjdk.org/jdk17u-dev/pull/1330