Added use_item_on_dude macro to sfall.h

Various code edits:
* Implemented more HookCalls/MakeCalls/SafeWriteBatch in code.
* Moved return/jump address consts into their respective functions.
* Changed for-loop with iterators to use pre-increment.

artifacts/scripting/headers/sfall.h

@@ -266,6 +266,12 @@
 #define ADD_PERK_MODE_PERK      (2)  // add to the player's perks
 #define ADD_PERK_MODE_REMOVE    (4)  // remove from the list of selectable perks (after added to the player)
 
+// instantly apply the item to dude_obj (w/o animation)
+#define use_item_on_dude(item)                          set_self(dude_obj);             \
+                                                        set_self(dude_obj);             \
+                                                        use_obj_on_obj(item, dude_obj); \
+                                                        set_self(0)
+
 // sfall_funcX macros
 #define add_extra_msg_file(name)                        sfall_func1("add_extra_msg_file", name)
 #define add_global_timer_event(time, fixedParam)        sfall_func2("add_g_timer_event", time, fixedParam)