Fix missing return values

Author: Sharparam

KillTrack.lua

@@ -655,7 +655,7 @@ end
 ---@return integer killsPerHour
 ---@return integer killsThisSession
 function KT:GetSessionStats()
-    if not self.Session.Start then return 0, 0, 0 end
+    if not self.Session.Start then return 0, 0, 0, 0 end
     local now = time()
     local session = now - self.Session.Start
     local kps = session == 0 and 0 or self.Session.Count / session

Timer.lua

@@ -104,7 +104,7 @@ end
 ---@param data { [any]: any }?
 ---@return boolean
 function T:Start(seconds, minutes, hours, callback, data)
-    if self.Running then return end
+    if self.Running then return false end
     self.Running = true
     self:Reset()
     seconds = tonumber(seconds) or 0