Keep original casts during reification to avoid VerifyError

#KT-26435 Fixed

compiler/testData/codegen/boxInline/reified/checkCast/kt26435_2.kt

@@ -0,0 +1,34 @@
+// FILE: 1.kt
+// WITH_RUNTIME
+
+package test
+
+open class Base(val name: String)
+class A(name: String) : Base(name)
+class B(name: String) : Base(name)
+
+var result = "fail"
+
+fun foo(base: Base) {
+    result = base.name
+}
+
+fun cond() = true
+
+inline fun <reified T : Base, reified Y : Base> process(a: Base) {
+    val z = if (cond())
+        a as T
+    else
+        a as Y
+    foo(z)
+}
+
+
+// FILE: 2.kt
+import test.*
+
+fun box(): String {
+    process<A, B>(A("OK"))
+
+    return result
+}