WorldMapHealingRatePatch & set_world_map_heal_time metarule (#539)

Fixes bug: healing time on worldmap is tied to real time clock, instead of game time.

artifacts/scripting/functions.yml

@@ -1427,6 +1427,14 @@
     detail: void set_rest_heal_time(int time)
     doc: 'Sets the time interval in minutes for healing during resting. The default is 180. Note: The interval will be reset each time the player reloads the game.'
     macro: sfall.h
+  - name: set_worldmap_heal_time
+    detail: void set_worldmap_heal_time(int time)
+    doc: |
+      Sets the time interval in minutes for healing during worldmap travel.
+      - passing 0 will revert to 1 second per real time (vanilla behavior)
+      - passing -1 will disable healing during travel
+      - the interval will be reset each time the player reloads the game
+    macro: sfall.h
   - name: set_rest_mode
     detail: void set_rest_mode(int flags)
     doc: 'Sets the bit flags for the rest mode (see `RESTMODE_*` constants in **sfall.h**). Passing 0 will reset the rest mode. It will also be reset each time the player reloads the game.'

artifacts/scripting/headers/sfall.h

@@ -395,6 +395,7 @@
 #define set_unique_id(obj)                                      sfall_func1("set_unique_id", obj)
 #define set_unjam_locks_time(time)                              sfall_func1("set_unjam_locks_time", time)
 #define set_window_flag(winID, flag, value)                     sfall_func3("set_window_flag", winID, flag, value)
+#define set_worldmap_heal_time(time)                            sfall_func1("set_worldmap_heal_time", time)
 #define show_win                                                sfall_func0("show_window")
 #define show_window(winName)                                    sfall_func1("show_window", winName)
 #define signal_close_game                                       sfall_func0("signal_close_game")