Fix for KT-7999: Wrong result when use nullable types as reified parameter, KT-8043: Unsafe cast to reified parameter throws NPE instead of TypeCastException

#KT-7999 Fixed
  #KT-8043 Fixed

~

compiler/testData/codegen/boxInline/reified/isCheck/nullable.1.kt

@@ -0,0 +1,24 @@
+import test.*
+
+fun box(): String {
+    if (null.foo<Any>() != true) return "fail 1"
+    if (null.foo<Any?>() != true) return "fail 2"
+
+    if (null.foo<A>() != true) return "fail 3"
+    if (null.foo<A?>() != true) return "fail 4"
+
+    val a = A()
+
+    if (a.foo<Any>() != true) return "fail 5"
+    if (a.foo<Any?>() != true) return "fail 6"
+
+    if (a.foo<A>() != true) return "fail 7"
+    if (a.foo<A?>() != true) return "fail 8"
+
+    val b = B()
+
+    if (b.foo<A>() != false) return "fail 9"
+    if (b.foo<A?>() != false) return "fail 10"
+
+    return "OK"
+}