convert macro calls to "complete strings with var"

data/campaigns/Legend_of_Wesmere/scenarios/16_The_Chief_must_die_utils.cfg

@@ -2,7 +2,8 @@
 #define INVISIBILITY_POTION USER_ID
     [object]
         id=invisibility_potion_{USER_ID}
-        description= _ "Crelanu's philter affecting " + {USER_ID}
+	{VARIABLE users_ID {USER_ID}}
+        description= _ "Crelanu's philter affecting $users_ID"
         duration=level
         [filter]
             id={USER_ID}

data/campaigns/Legend_of_Wesmere/utils/low-macros.cfg

@@ -25,8 +25,9 @@
 
 #define LOOT AMOUNT SIDE
     [message]
+        {VARIABLE amount_gold {AMOUNT}}
         speaker=narrator
-        message= _ "You retrieve " + {AMOUNT} + _ " pieces of gold."
+        message= _ "You retrieve $amount_gold pieces of gold."
         image=wesnoth-icon.png
     [/message]