Try to avoid expensive stack walk in QuickDeliverException

Stack popping is a debug feature. We can skip the
stack walk if no stack pops have been requested.
This makes PMD benchmark about 10% faster.

Bug: 136438735
Test: test.py -b --host --64 --interpreter
Test: run-libjdwp-tests.sh '--mode=host' '--variant=X64'
Change-Id: I09b9a444c110434d9bb7253776128bd3fe9c28ab
1 file changed