Fix handling of SystemExit and exit code.  Patch by Brodie Rao.
diff --git a/Lib/multiprocessing/process.py b/Lib/multiprocessing/process.py
index 482ea0a..44c1e44 100644
--- a/Lib/multiprocessing/process.py
+++ b/Lib/multiprocessing/process.py
@@ -267,7 +267,7 @@
             else:
                 sys.stderr.write(str(e.args[0]) + '\n')
                 sys.stderr.flush()
-                exitcode = 0 if isinstance(e.args[0], str) else 1
+                exitcode = 1
         except:
             exitcode = 1
             import traceback