fixes a narrowing warning (treated as an error) affecting some platfo…

…rms (#2117)

Looks like #2063 has a
"narrowing" warning that is now treated as an error and is hence causing
CI builds to fail.

Applies the same fix as
#2107 to fix this
warning.

test_conformance/extensions/cl_khr_semaphore/test_semaphores_queries.cpp

@@ -185,7 +185,8 @@ struct SemaphoreMultiDeviceContextQueries : public SemaphoreTestBase
         test_error(err, "Unable to get maximal number of compute units");
 
         cl_device_partition_property partitionProp[] = {
-            CL_DEVICE_PARTITION_EQUALLY, maxComputeUnits / 2, 0
+            CL_DEVICE_PARTITION_EQUALLY,
+            static_cast<cl_device_partition_property>(maxComputeUnits / 2), 0
         };
 
         cl_uint deviceCount = 0;