Fixed ANL causing the game to end before the start of turn 1...

...when empty sides are specified in the MP game setup - yet another
consequence of strict unit unstoring mechanics

(From http://forums.wesnoth.org/viewtopic.php?f=4&t=28961)

changelog

@@ -16,6 +16,7 @@ Version 1.7.13+svn:
    * Fix bug #15383 (Multiplayer Campaigns can't be loaded from savegame)
    * Fix bug #15391 (Warnings in multiplayer games)
    * Allow a 1-sides game to be started (Debian bug #568029)
+   * Fixed A New Land not working when there are empty sides
  * User interface:
    * Rewrote the sizing code of the tree view widget
  * Miscellaneous and bug fixes:

data/multiplayer/scenarios/ANL_utils/ANL_special_macros.cfg

@@ -27,17 +27,25 @@
 #enddef
 
 #define SET_NAMES SIDE
-    [store_unit]
-        [filter]
+    [if]
+        [have_unit]
             side={SIDE}
             canrecruit=yes
-        [/filter]
-        variable=leader
-    [/store_unit]
-    {VARIABLE player_{SIDE}.name $leader.name}
-    [unstore_unit]
-        variable=leader
-    [/unstore_unit]
+        [/have_unit]
+        [then]
+            [store_unit]
+                [filter]
+                    side={SIDE}
+                    canrecruit=yes
+                [/filter]
+                variable=leader
+            [/store_unit]
+            {VARIABLE player_{SIDE}.name $leader.name}
+            [unstore_unit]
+                variable=leader
+            [/unstore_unit]
+        [/then]
+    [/if]
 #enddef
 
 #define SET_SIDE_VARIABLES SIDE

players_changelog

@@ -22,6 +22,7 @@ Version 1.7.13-1.8beta6:
  * Multiplayer:
    * An early test version of the multiplayer port of "Legend of Wesmere" 
      is available when starting wesnoth with the commandline argument "--debug".
+   * Fixed A New Land not working when there are empty sides
 
  * User interface:
    * Fold several player groups by default in the lobby.