Check player names and assign bounties correctly

init.lua

@@ -2,7 +2,7 @@ bounty = {}
 bounty.file = core.get_worldpath() .. '/bounty.txt'
 bounty.data = {}
 bounty.prizes = false --determines if prizes or amount per points game-mechanic is used
-if false then
+if true then
     bounty.prizes = 'currency:minegeld_100'
     bounty.points_per_prize = 20 --per 100 points you get a default:steel_ingot
 else
@@ -140,22 +140,32 @@ bounty.get_player_bounty = function(player_name)
     return prize
 end
 
+bounty.player_exists = function(player_name)
+    if not minetest.get_player_by_name(player_name) then
+        return false
+    else
+        return true
+    end
+end
+
 --chatcommands for testing purposes
 core.register_chatcommand('bounty', {
-    params = '',
     description = 'Place bounty on offenders and increasing the bounty by 20',
     privs = { interact = true },
     func = function(name, params)
-        bounty.increase(name, 20)
+        if bounty.player_exists(params) then
+            bounty.increase(params, 20)
+        end
     end
 })
 
 core.register_chatcommand('forgive', {
-    params = '',
     description = 'Forgive offender and decrease bounty by 20',
     privs = { interact = true },
     func = function(name, params)
-        bounty.decrease(name, 20)
+        if bounty.player_exists(params) then
+            bounty.decrease(params, 20)
+        end
     end
 })