Find Usages: Fix exception in the search of class with default parameters in primary constructor

idea/testData/findUsages/kotlin/findClassUsages/primaryConstructorWithDefaultParams.0.kt

@@ -0,0 +1,8 @@
+// PSI_ELEMENT: org.jetbrains.kotlin.psi.JetClass
+// OPTIONS: usages, constructorUsages
+class <caret>A(a: Int = 1)
+
+fun test() {
+    A(0)
+    A()
+}

idea/testData/findUsages/kotlin/findClassUsages/primaryConstructorWithDefaultParams.results.txt

@@ -0,0 +1,2 @@
+New instance creation (6: 5) A(0)
+New instance creation (7: 5) A()