git: openjdk/mobile: 8233491: Crash in AdapterHandlerLibrary::get_adapter with CDS due to code cache exhaustion

[duke]

Changeset: 14475e47
Author:    Tobias Hartmann <thartmann at openjdk.org>
Date:      2019-11-07 07:02:55 +0000
URL:       https://git.openjdk.java.net/mobile/commit/14475e47

8233491: Crash in AdapterHandlerLibrary::get_adapter with CDS due to code cache exhaustion

Added null check.

Reviewed-by: kvn, iklam

! src/hotspot/share/runtime/sharedRuntime.cpp