Don't log 32/64-bit cryptography 'frozen zipimport' errors

No need to log "<frozen zipimport>:259: UserWarning: You are using cryptography on a 32-bit Python on a 64-bit Windows Operating System. Cryptography will be significantly faster if you switch to using a 64-bit Python." all the time.

syncplay/utils.py

@@ -211,7 +211,8 @@ def blackholeStdoutForFrozenWindow():
                     self._file = open(path, 'a', encoding='utf-8')
                     # TODO: Handle errors.
                 if self._file is not None:
-                    self._file.write(text)
+                    if not text.startswith("<frozen zipimport>"):
+                        self._file.write(text)
                     self._file.flush()
 
             def flush(self):