Join declaration & assignment: treat assignment with this. correctly #KT-16000 Fixed

idea/testData/intentions/joinDeclarationAndAssignment/multipleConstructorsWithThis.kt

@@ -0,0 +1,13 @@
+// IS_APPLICABLE: false
+
+class My {
+    val x: Int<caret>
+
+    constructor(x: Int) {
+        this.x = x
+    }
+
+    constructor() {
+        x = 42
+    }
+}