Fix NPE in KtSourceElement.elementType #KT-44152 Fixed

compiler/testData/codegen/box/toArray/kt44152.kt

@@ -0,0 +1,17 @@
+// SKIP_JDK6
+// TARGET_BACKEND: JVM_IR
+// FULL_JDK
+// WITH_STDLIB
+// USE_PSI_CLASS_FILES_READING
+// Based on incorrectToArrayDetection.kt
+
+import java.lang.reflect.Modifier
+
+abstract class A : Collection<String> {
+    protected fun <T> foo(x: Array<T>): Array<T> = x
+}
+
+fun box(): String {
+    val method = A::class.java.declaredMethods.single { it.name == "foo" }
+    return if (Modifier.isProtected(method.modifiers)) "OK" else "Fail: $method"
+}