Presentation: Fix NPE on functional type rendering

#KT-17638 Fixed

idea/src/org/jetbrains/kotlin/idea/findUsages/KotlinElementDescriptionProvider.kt

@@ -103,6 +103,8 @@ class KotlinElementDescriptionProvider : ElementDescriptionProvider {
                             }
                         }
                     }
+
+                    override fun visitParameter(parameter: KtParameter, data: Unit) = parameter.typeReference?.accept(this, data) ?: "???"
                 },
                 Unit
         )

idea/testData/codeInsight/breadcrumbs/FunctionalType.kt

@@ -0,0 +1 @@
+fun <caret>test(f: (Int) -> Int) {}

idea/testData/codeInsight/breadcrumbs/FunctionalType.txt

@@ -0,0 +1,4 @@
+Crumbs:
+  test()
+Tooltips:
+  function <b><code>test((Int) -&gt; Int)</code></b>

idea/tests/org/jetbrains/kotlin/idea/codeInsight/BreadcrumbsTestGenerated.java

@@ -54,6 +54,12 @@ public class BreadcrumbsTestGenerated extends AbstractBreadcrumbsTest {
         doTest(fileName);
     }
 
+    @TestMetadata("FunctionalType.kt")
+    public void testFunctionalType() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/codeInsight/breadcrumbs/FunctionalType.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("If.kt")
     public void testIf() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/codeInsight/breadcrumbs/If.kt");