Reform random map locations

the locations of the different characters aren't independant, but they weren't in the first place

(cherry picked from commit 9a3fe1df65)

game/scripts/events/DayNight.rpy

@@ -1,4 +1,3 @@
-
 label day_start:
     show screen blkfade
     hide snape_main
@@ -87,7 +86,7 @@ label day_start:
 
         # Randomisers
         random_gold = renpy.random.randint(8, 40)
-        random_map_loc = renpy.random.randint(1, 5)
+        map_randomobj = renpy.random.Random()
 
         # Send salary every 7th day
         if game.day % 7 == 0:
@@ -201,7 +200,7 @@ label night_start:
 
         # Randomisers
         random_gold = renpy.random.randint(8, 40)
-        random_map_loc = renpy.random.randint(1, 5)
+        map_randomobj = renpy.random.Random()
 
     # Update map locations
     call set_her_map_location()