added MAKE_HERO and UNMAKE_HERO macros in macros/image-utils.cfg

data/core/macros/image-utils.cfg

@@ -124,3 +124,40 @@
         [/effect]
     [/object]
 #enddef
+
+#define MAKE_HERO NAME
+    # Give an existing unit a hero overlay
+    [store_unit]
+        [filter]
+            description={NAME}
+        [/filter]
+        variable=hero_store
+        kill=no
+    [/store_unit]
+    [unit_overlay]
+        x=$hero_store.x
+        y=$hero_store.y
+        image=misc/hero-icon.png
+    [/unit_overlay]
+
+    {CLEAR_VARIABLE hero_store}
+#enddef
+
+#define UNMAKE_HERO NAME
+    # Remove the hero overlay from a unit
+    [store_unit]
+        [filter]
+            description={NAME}
+        [/filter]
+        variable=hero_store
+        kill=no
+    [/store_unit]
+    [remove_unit_overlay]
+        x=$hero_store.x
+        y=$hero_store.y
+        image=misc/hero-icon.png
+    [/remove_unit_overlay]
+
+    {CLEAR_VARIABLE hero_store}
+#enddef
+