Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/passInlineClassAsVarargGeneric.kt

@@ -0,0 +1,27 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class UInt<T: Int>(val value: T)
+
+fun <T> takeVarargs(vararg e: T): T {
+    return e[e.size - 1]
+}
+
+fun <T: Int> test(u1: UInt<T>, u2: UInt<T>, u3: UInt<T>?): Int {
+    val a = takeVarargs(u1, u2)
+    val b = takeVarargs(u3) ?: UInt(-1)
+    val c = takeVarargs(u1, u3) ?: UInt(-1)
+
+    return a.value + b.value + c.value
+}
+
+fun box(): String {
+    val u1 = UInt(0)
+    val u2 = UInt(1)
+    val u3 = UInt(2)
+    if (test(u1, u2, u3) != 1 + 2 + 2) return "fail"
+
+    return "OK"
+}