Loader: Fix OOM in loaderGetDeviceRegistryFiles()
Loader: Fix OOM in loaderGetDeviceRegistryFiles()

loaderGetDeviceRegistryEntry() out of memory result was not handled properly.

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers