layers: Fix CTS BufferView UpdateTemplate crash
layers: Fix CTS BufferView UpdateTemplate crash

Change-Id: I2d03265b465ffc869f52ca85e6ad23301424a8d7

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools