Summary
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`JNI_GetCreatedJavaVMs` will now only return a VM that has been successfully initialized.

Problem
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`JNI_GetCreatedJavaVMs` will currently return a VM that has only just started to be created by `JNI_CreateJavaVM`. Consequently, if code then tries to attach to that VM it can crash in various ways, as the VM may not yet be ready for attaching.

Solution
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`JNI_GetCreatedJavaVMs` will now only return a VM that has been successfully initialized.

Specification
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There are no changes to the JNI specification. The specification for `JNI_GetCreatedJavaVMs` already states:

> Returns all Java VMs that have been created.

and it is reasonable to expect that "created" means fully created, not "in the process of being created".