Fix code generation for Array<C> element access where C is inline class

compiler/testData/codegen/box/arrays/arraysOfInlineClass/accessArrayOfUnsigned.kt

@@ -0,0 +1,12 @@
+// WITH_UNSIGNED
+// IGNORE_BACKEND: JVM_IR, JS_IR, JS
+
+val xs = Array(2) { 42u }
+
+fun box(): String {
+    xs[0] = 12u
+    val t = xs[0]
+    if (t != 12u) throw AssertionError("$t")
+
+    return "OK"
+}