Fix timing format string in the test suite.

wxStopWatch::Time() returns a long value so use %ld, not %d.

This fixes assert failure when using "-t" option with the test suite under 64
bit Unix architectures.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65759 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/test.cpp

@@ -209,7 +209,7 @@ public:
         m_watch.Pause();
         wxPrintf(GetResultStr(m_result));
         if (m_timing)
-            wxPrintf("  %6d ms", m_watch.Time());
+            wxPrintf("  %6ld ms", m_watch.Time());
         wxPrintf("\n");
     }