Skip RunPropArrayInfoTest if there are no properties

When there are no properties, the value passed as `param_value_size` is
-1, but since the argument is of type `size_t`, this is interpreted as a
really big value (and hence not an invalid value, as the test intends).

Moreover, if the `command_buffer` was created without properties, then
even a size of 0 is large enough to store them. This test requires
`command_buffer` to have properties for there to be invalid values for
`param_value_size`.

Signed-off-by: Gorazd Sumkovski <gorazd.sumkovski@arm.com>

test_conformance/extensions/cl_khr_command_buffer/negative_command_buffer_get_info.cpp

@@ -218,18 +218,22 @@ struct GetCommandBufferInfo : public BasicCommandBufferTest
 
     cl_int RunPropArrayInfoTest()
     {
-        std::vector<cl_command_buffer_properties_khr> properties;
-        properties.resize(number_of_properties);
-
-        cl_int error = clGetCommandBufferInfoKHR(
-            command_buffer, CL_COMMAND_BUFFER_PROPERTIES_ARRAY_KHR,
-            number_of_properties * sizeof(cl_command_buffer_properties_khr) - 1,
-            properties.data(), nullptr);
-
-        test_failure_error_ret(error, CL_INVALID_VALUE,
-                               "clGetCommandBufferInfoKHR should return "
-                               "CL_INVALID_VALUE",
-                               TEST_FAIL);
+        if (0 != number_of_properties)
+        {
+            std::vector<cl_command_buffer_properties_khr> properties;
+            properties.resize(number_of_properties);
+
+            cl_int error = clGetCommandBufferInfoKHR(
+                command_buffer, CL_COMMAND_BUFFER_PROPERTIES_ARRAY_KHR,
+                number_of_properties * sizeof(cl_command_buffer_properties_khr)
+                    - 1,
+                properties.data(), nullptr);
+
+            test_failure_error_ret(error, CL_INVALID_VALUE,
+                                   "clGetCommandBufferInfoKHR should return "
+                                   "CL_INVALID_VALUE",
+                                   TEST_FAIL);
+        }
 
         return TEST_PASS;
     }