fixed typo

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@768 bbaffbd6-741e-11dd-a85d-61de82d9cad9

src/pycam/Utils/threading.py

@@ -435,7 +435,7 @@ class ProcessStatistics(object):
         for key in self.workers.keys():
             # be careful: maybe the workers dictionary changed in between
             try:
-                timestampe = self.workers[key]
+                timestamp = self.workers[key]
                 if timestamp < oldest_valid:
                     del self.workers[key]
             except KeyError: