loader: Fix variable shadowing warning.
loader: Fix variable shadowing warning.

Change-Id: I71916c5300c24158901123f775b7b2fec3293e5b

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