UnitTest: Switch to Assert::IsTrue for primitive datatypes

Visual Studio 2019 has issues compiling Assert::AreEqual<stdex::langid>.

Signed-off-by: Simon Rozman <simon@rozman.si>

UnitTests/ring.cpp

@@ -52,7 +52,7 @@ namespace UnitTests
 			if (num_read > 7)
 				num_read = 7;
 			for (size_t i = 0; i < num_read; ++i)
-				Assert::AreEqual(seed++, ptr[i]);
+				Assert::IsTrue(ptr[i] == seed++);
 			ring.pop(num_read);
 		}
 		writer.join();