Fix for KT-10313: ClassCastException with Generics

#KT-10313 Fixed

compiler/testData/codegen/box/casts/literalExpressionAsGenericArgument/binaryExpressionCast.kt

@@ -0,0 +1,7 @@
+class Box<T>(val value: T)
+
+fun box() : String {
+    val b = Box<Long>(2 * 3)
+    val expected: Long? = 6L
+    return if (b.value == expected) "OK" else "fail"
+}