Hopefully a fix for an oft-reported but not gna-ized bug.

Also cleaned up the code.

data/campaigns/Eastern_Invasion/scenarios/Evacuation.cfg

@@ -261,28 +261,15 @@
 				y=16-19
 				letter=c
 				[/terrain]
-				
-				[store_unit]
-					[filter]
-					x=1-31,1-20
-					y=21-24,18-20
-					[/filter]
-				variable=temporary
-				kill=yes
-				[/store_unit]
 				[kill]
 				side=1
+					[not]
+					x=x=1-31,1-20
+					y=21-24,18-20
+					[/not]
 				fire_event=yes
 				animate=yes
 				[/kill]
-				{FOREACH temporary i}
-					[unstore_unit]
-					variable=temporary[$i]
-					[/unstore_unit]
-				{NEXT i}
-				[clear_variable]
-				name=temporary
-				[/clear_variable]
 
 				[message]
 				description=Gweddry