Fix KNPE in different "Generate members" for expect class

#KT-27595 Fixed

idea/testData/multiModuleQuickFix/generateHashCodeInExpect/common/common.kt

@@ -0,0 +1,9 @@
+// "Generate 'hashCode()'" "true"
+// TOOL: org.jetbrains.kotlin.idea.inspections.EqualsOrHashCodeInspection
+
+expect class With<caret>Constructor(x: Int, s: String) {
+    val x: Int
+    val s: String
+
+    override fun equals(other: Any?): Boolean
+}

idea/testData/multiModuleQuickFix/generateHashCodeInExpect/common/common.kt.after

@@ -0,0 +1,10 @@
+// "Generate 'hashCode()'" "true"
+// TOOL: org.jetbrains.kotlin.idea.inspections.EqualsOrHashCodeInspection
+
+expect class With<caret>Constructor(x: Int, s: String) {
+    val x: Int
+    val s: String
+
+    override fun equals(other: Any?): Boolean
+    override fun hashCode(): Int
+}

idea/testData/multiModuleQuickFix/generateHashCodeInExpect/jvm/jvm.kt

@@ -0,0 +1 @@
+actual class WithConstructor(actual val x: Int, actual val s: String)

idea/testData/multiModuleQuickFix/generateHashCodeInExpect/jvm/jvm.kt.after

@@ -0,0 +1 @@
+actual class WithConstructor(actual val x: Int, actual val s: String)