Fix erratically failing threads_exception python test

Examples/test-suite/python/threads_exception_runme.py

@@ -23,10 +23,12 @@ except RuntimeError,e:
 try:
   t.hosed()
 except threads_exception.Exc,e:
-  if e.code != 42:
-    raise RuntimeError
-  if e.msg != "Hosed":
-    raise RuntimeError, "bad... msg: %s" % e.msg
+  code = e.code
+  if code != 42:
+    raise RuntimeError, "bad... code: %d" % code
+  msg = e.msg
+  if msg != "Hosed":
+    raise RuntimeError, "bad... msg: '%s' len: %d" % (msg, len(msg))
 
 for i in range(1,4):
   try:

Examples/test-suite/threads_exception.i

@@ -20,6 +20,7 @@ public:
   Exc(int c, const char *m) {
     code = c;
     strncpy(msg,m,255);
+    msg[255] = 0;
   }
   int code;
   char msg[256];