Fix the control flow in pending(). Thanks to Ury Marshak!!!

Rather than blaming window for reporting success as an error, the
else clause on the second try block should be an except clause.

src/ZEO/zrpc/connection.py

@@ -400,9 +400,6 @@ class Connection(smac.SizedMessageAsyncConnection):
             except select.error, err:
                 if err[0] == errno.EINTR:
                     continue
-                elif err[0] == 0:
-                    # Windows sez: "Error: Success." :-)
-                    break
                 else:
                     raise
             if not r:
@@ -411,7 +408,7 @@ class Connection(smac.SizedMessageAsyncConnection):
                 self.handle_read_event()
             except asyncore.ExitNow:
                 raise
-            else:
+            except:
                 self.handle_error()
 
 class ManagedServerConnection(Connection):