Try to fix MSVC build

Change-Id: I24c48d2540a8cb7d2a823862d53cddf90d41f94a

include/opencl/platforminfo.hxx

@@ -43,6 +43,9 @@ struct OPENCL_DLLPUBLIC OpenCLPlatformInfo
     std::vector<OpenCLDeviceInfo> maDevices;
 
     OpenCLPlatformInfo();
+    ~OpenCLPlatformInfo()
+    {
+    }
 };
 
 OPENCL_DLLPUBLIC std::ostream& operator<<(std::ostream& rStream, const OpenCLPlatformInfo& rPlatform);