Half-open connection limit warning fix

- it only should complain if on Windows and can't determine the Windows
  version

src/helper_startup.py

@@ -140,10 +140,9 @@ def loadConfig():
 
 def isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections():
     try:
-        VER_THIS=StrictVersion(platform.version())
         if sys.platform[0:3]=="win":
+            VER_THIS=StrictVersion(platform.version())
             return StrictVersion("5.1.2600")<=VER_THIS and StrictVersion("6.0.6000")>=VER_THIS
         return False
     except Exception as err:
-        print "Info: we could not tell whether your OS is limited to having very few half open connections because we couldn't interpret the platform version. Don't worry; we'll assume that it is not limited. This tends to occur on Raspberry Pis. :", err
         return False