fix(server): normalise item count as a positive integer

Resolves #1960.

Author: thelindat

modules/inventory/server.lua

@@ -1692,7 +1692,7 @@ lib.callback.register('ox_inventory:swapItems', function(source, data)
         return
     end
 
-	if data.count < 1 then return end
+	data.count = math.max(1, math.floor(data.count or 1))
 
 	local playerInventory = Inventory(source)
 
@@ -2494,7 +2494,7 @@ local function giveItem(playerId, slot, target, count)
 
 	if not fromInventory or not toInventory then return end
 
-	if type(count) ~= 'number' or count <= 0 then count = 1 end
+	count = math.max(1, math.floor(count or 1))
 
 	if toInventory.player then
 		local data = fromInventory.items[slot]

modules/shops/server.lua

@@ -199,7 +199,7 @@ end
 
 lib.callback.register('ox_inventory:buyItem', function(source, data)
 	if data.toType == 'player' then
-		if data.count == nil then data.count = 1 end
+		data.count = math.max(1, math.floor(data.count or 1))
 
 		local playerInv = Inventory(source)