remove_stopped function doesn't remove stopped

[OmarShehata]

Whenever I would call "sound:stop()" it would only stop one instance, even if there were many playing. This was apparently due to the remove_stopped function indiscriminately removing sound instances even if they were still playing. A simply check fixed this and now calling stop() stops all playing instances

local function remove_stopped(sources)
local remove = {}
for s in pairs(sources) do
if(s:isStopped())then remove[s] = true end---added the check here
end
for s in pairs(remove) do
sources[s] = nil
end
end