loader: Fix another possible memory leak
loader: Fix another possible memory leak

Added another cleanup case, just in case...

Change-Id: Ia6e09ce12c29314a1cce6b1cdcd72bdd7749f655

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