layers: Update some layers to avoid repeated call to get_dispatch_key()
diff --git a/layers/shader_checker.cpp b/layers/shader_checker.cpp
index e3f822c..bb41906 100644
--- a/layers/shader_checker.cpp
+++ b/layers/shader_checker.cpp
@@ -74,7 +74,7 @@
 debug_report_data *mid(VkInstance object)
 {
     dispatch_key key = get_dispatch_key(object);
-    layer_data *my_data = get_my_data_ptr(get_dispatch_key(object), layer_data_map);
+    layer_data *my_data = get_my_data_ptr(key, layer_data_map);
 #if DISPATCH_MAP_DEBUG
     fprintf(stderr, "MID: map: %p, object: %p, key: %p, data: %p\n", &layer_data_map, object, key, my_data);
 #endif