fix problem where disguise is "sticky"

In some cases, the disguise would get stuck as
applied, even if you were captured while trying
to infiltrate.  Now, when captured, the disguise
is removed.

source/module_game_menus.py

@@ -16016,6 +16016,7 @@
          #  (try_end),
          #(try_end),
 
+         (assign, "$g_mt_mode", tcm_default), # clear any disguses
          (set_camera_follow_party, "$capturer_party"),
          (assign, "$g_player_is_captive", 1),
          (store_random_in_range, ":random_hours", 18, 30),
@@ -16090,6 +16091,7 @@
     [
       ("continue",[],"Continue...",
        [
+           (assign, "$g_mt_mode", tcm_default), # clear any disguses
            (assign, "$g_player_is_captive", 1),
            (store_random_in_range, ":random_hours", 16, 22),
            (call_script, "script_event_player_captured_as_prisoner"),
@@ -16119,6 +16121,7 @@
     [
       ("continue",[],"Continue...",
        [
+           (assign, "$g_mt_mode", tcm_default), # clear any disguses
            (assign, "$g_player_is_captive", 1),
            (store_random_in_range, ":random_hours", 16, 22),
            (call_script, "script_event_player_captured_as_prisoner"),