KT-7377 Throwable: Empty PSI elements should not be passed to createDescriptor from UnusedReceiverParameterInspection

#KT-7377 fixed

idea/testData/inspections/unusedReceiverParameter/kt7377.kt

@@ -0,0 +1,9 @@
+class Clazz(foo: String) {
+    val foo = foo
+
+    val
+}
+
+fun main(args: Array<String>) {
+    System.setProperty("java.awt.headless", "true")
+}