improvement: only change current music when new

It'll avoid having the music resetting every time you enter a new map with the same music
(entering in a house for instance)

sonic-radiance.love/scenes/overworld/init.lua

@@ -63,6 +63,8 @@ function OverWorld:new(area, playerx, playery)
   self.message = "Test de message"
   self.messageOpacity = 0
 
+  self.isPlaying = ""
+
   self.events = EventManager(self)
 end
 
@@ -73,8 +75,12 @@ function OverWorld:updateCurrentMap(map)
 end
 
 function OverWorld:playMapMusic(map)
-  self.assets:setMusic("assets/music/" .. map.music .. ".mp3")
-  self.assets:playMusic()
+  local newMusic = map.music
+  if (newMusic ~= self.isPlaying) then
+    self.assets:setMusic("assets/music/" .. newMusic .. ".mp3")
+    self.assets:playMusic()
+    self.isPlaying = newMusic
+  end
 end
 
 function OverWorld:startEvent()