Ensure that when ds_profile is NULL, NATIVE_CPU is selected.

Change-Id: Iab714a296ce0f807b5badd1ff96a99f3da2b24f8

sc/source/core/opencl/opencl_device.cxx

@@ -447,7 +447,7 @@ ds_device getDeviceSelection(const char* sProfilePath, bool bForceSelection)
         if (!profile)
         {
             // failed to initialize profile.
-            selectedDevice.oclDeviceID = NULL;
+            selectedDevice.type = DS_DEVICE_NATIVE_CPU;
             return selectedDevice;
         }