Change WML condition equals=true to boolean_equals=true (bug #24951)

changelog

@@ -2,6 +2,9 @@ Version 1.13.5+dev:
  * Campaigns:
    * Eastern Invasion:
      * Fixed broken village encounters.
+   * Delfador's Memoirs:
+     * S9: Resolved inability to end level even when Delfador has the Staff (bug #24951)
+	 * S19: Resolved undead veterans victory condition not working properly.
  * Music and sound effects:
    * Added a preference to pause the music when the game loses focus.
    * Now the music fades out between scenarios.

data/campaigns/Delfadors_Memoirs/scenarios/09_Houses_of_the_Undead.cfg

@@ -169,7 +169,7 @@
         [if]
             [variable]
                 name=delf_has_staff
-                equals=true
+                boolean_equals=true
             [/variable]
             [then]
                 {CLEAR_VARIABLE delf_has_staff}

data/campaigns/Delfadors_Memoirs/scenarios/19_Showdown_in_the_Northern_Swamp.cfg

@@ -494,7 +494,7 @@
         [if]
             [variable]
                 name=undead_veterans
-                equals=true
+                boolean_equals=true
             [/variable]
             #wmllint: local spelling un-life
             [then]

players_changelog

@@ -3,6 +3,9 @@ changes may be omitted). For a complete list of changes, see the main
 changelog: https://github.com/wesnoth/wesnoth/blob/master/changelog
 
 Version 1.13.5+dev:
+ * Campaigns:
+   * Delfador's Memoirs:
+     * S9: Resolved inability to end level even when Delfador has the Staff (bug #24951)
  * Music and sound effects:
    * Added a preference to pause the music when the game loses focus.
    * Now the music fades out between scenarios.