layers: Fix printf formats

Add validation to printf format strings
diff --git a/layers/device_limits.cpp b/layers/device_limits.cpp
index d055fe5..a62d72b 100644
--- a/layers/device_limits.cpp
+++ b/layers/device_limits.cpp
@@ -242,7 +242,7 @@
         return result;
     } else {
         log_msg(my_data->report_data, VK_DBG_REPORT_ERROR_BIT, VK_OBJECT_TYPE_INSTANCE, 0, 0, DEVLIMITS_INVALID_INSTANCE, "DL",
-            "Invalid instance (%#" PRIxLEAST64 ") passed into vkEnumeratePhysicalDevices().", instance);
+            "Invalid instance (%#" PRIxLEAST64 ") passed into vkEnumeratePhysicalDevices().", (uint64_t)instance);
     }
     return VK_ERROR_VALIDATION_FAILED;
 }
@@ -305,7 +305,7 @@
         return;
     } else {
         log_msg(phy_dev_data->report_data, VK_DBG_REPORT_ERROR_BIT, VK_OBJECT_TYPE_PHYSICAL_DEVICE, 0, 0, DEVLIMITS_INVALID_PHYSICAL_DEVICE, "DL",
-            "Invalid physicalDevice (%#" PRIxLEAST64 ") passed into vkGetPhysicalDeviceQueueFamilyProperties().", physicalDevice);
+            "Invalid physicalDevice (%#" PRIxLEAST64 ") passed into vkGetPhysicalDeviceQueueFamilyProperties().", (uint64_t)physicalDevice);
     }
 }