seitch to using the {IS_HERO} macro in Two Brothers

data/campaigns/Two_Brothers/scenarios/1_Rooting_Out_A_Mage.cfg

@@ -51,6 +51,7 @@ next_scenario=2_The_Chase
 		description=Arne
 		user_description= _ "Arne"
 		unrenamable=yes
+		{IS_HERO}
 		side=1
 		canrecruit=1
 		controller=human
@@ -60,6 +61,7 @@ next_scenario=2_The_Chase
 			user_description= _ "Bjarn"
 			type=Red Mage
 			side=1
+			{IS_HERO}
 			x=31
 			y=21
 		[/unit]

data/campaigns/Two_Brothers/scenarios/2_The_Chase.cfg

@@ -68,6 +68,7 @@ victory_when_enemies_defeated=no
 		unrenamable=yes
 		side=1
 		canrecruit=1
+		{IS_HERO}
 		controller=human
 		recruit=Horseman,Bowman,Spearman
 		team_name=good

data/campaigns/Two_Brothers/scenarios/3_Guarded_Castle.cfg

@@ -79,6 +79,7 @@ victory_when_enemies_defeated=no
 		fog=no
 		side=1
 		canrecruit=1
+		{IS_HERO}
 		controller=human
 		recruit=Horseman,Bowman,Spearman
 		team_name=good
@@ -453,6 +454,7 @@ victory_when_enemies_defeated=no
 			type=Red Mage
 			description=Bjarn
 			user_description= _ "Bjarn"
+			{IS_HERO}
 			x=3
 			y=2
 			[modifications]

data/campaigns/Two_Brothers/scenarios/4_Return_to_the_Village.cfg

@@ -66,6 +66,7 @@ next_scenario=null
 		unrenamable=yes
 		side=1
 		canrecruit=1
+		{IS_HERO}
 		controller=human
 		recruit=Horseman,Bowman,Spearman
 		team_name=good
@@ -126,6 +127,7 @@ next_scenario=null
 		name=start
 		[recall]
 			description=Bjarn
+			{IS_HERO}
 		[/recall]
 
 		[message]