Fixed an issue when get_messages() timeout was 0 we no messages were …

…returned.

-Related to Issue #69.

Signed-off-by: David Rebbe <drebbe@intrepidcs.com>
(cherry picked from commit bea054f)

src/methods.cpp

@@ -987,7 +987,7 @@ PyObject* meth_get_messages(PyObject* self, PyObject* args)
             return set_ics_exception_dev(exception_runtime_error(), obj, "Failed to allocate " SPY_MESSAGE_OBJECT_NAME);
         }
         Py_BEGIN_ALLOW_THREADS
-        for (double i=timeout; i > 0; --i) {
+        for (double i=timeout; i >= 0; --i) {
             count = 20000;
             errors = 0;
             if (!icsneoGetMessages(handle, (icsSpyMessage*)msgs, &count, &errors) && !errors) {