more safeguards for wrong files credit format + added sprite managers to game credits

Data/Scripts/016_UI/001_Non-interactive UI/007_UI_Credits.rb

@@ -77,6 +77,18 @@ off Pokémon Red and Blue, as well as
 Pokémon Gold and Silver.
 Both games are made by Game Freak.
 
+Sprites pack manager
+Kiwi
+
+Sprite Managers
+Howls
+Kiwi
+Melmcs
+Milchik the Miltank
+rezza
+Punko
+Skel'n
+
 All of the custom fused Pokémon sprites 
 were made by various members of the sp
 Pokémon Infinite Fusion Discord

Data/Scripts/050_AddOns/SpriteCreditsUtils.rb

@@ -82,7 +82,11 @@ end
 def select_spriter(minNbSprites = 10, save_in_var = 1)
   spriters_list = list_all_spriters_with_min_nb_of_sprites(minNbSprites)
   commands = []
-  spriters_list.each { |name, i| commands.push([i, name, name]) }
+  spriters_list.each do |name, i|
+    if name
+      commands.push([i, name, name])
+    end
+  end
   chosen = pbChooseList(commands, 0, nil, 1)
   return nil if !chosen
   return chosen
@@ -95,7 +99,9 @@ def list_all_spriters_with_min_nb_of_sprites(minNbSprites)
 
   File.readlines(filename).each do |line|
     name = line.strip.split(',')[1]
-    spriters_hash[name] += 1
+    if name
+      spriters_hash[name] += 1
+    end
   end
 
   spriters_list = []