Fix warning about extra token.

Libs/PluginFramework/Testing/Cpp/ctkPluginFrameworkTestRunner.cpp

@@ -40,7 +40,7 @@
 #ifdef _WIN32
 #include <windows.h>
 #include <stdlib.h>
-#endif _WIN32
+#endif // _WIN32
 
 class TestRunner : public QThread
 {