only .call() PollHooks when they're "due"

src/IRCBot.py

@@ -376,7 +376,8 @@ class Bot(object):
 
     def _check(self):
         for poll_timeout in self._poll_timeouts:
-            poll_timeout.call()
+            if poll_timeout.next() == 0:
+                poll_timeout.call()
 
         throttle_filled = False
         for server in list(self.servers.values()):

src/LockFile.py

@@ -32,8 +32,7 @@ class LockFile(PollHook.PollHook):
     def next(self):
         return max(0, (self._next_lock-utils.datetime_utcnow()).total_seconds())
     def call(self):
-        if self.next() == 0:
-            self.lock()
+        self.lock()
 
     def unlock(self):
         if os.path.isfile(self._lock_location):