loader: Fix crash from loading invalid ICD
loader: Fix crash from loading invalid ICD

Addresses LunarXchange issue 711

Change-Id: Ia67441a3adde5ddf9d72ffd12c8cc5fb44071b96

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