Fix KNPE in KotlinAddImportActionKt.createSingleImportActionForConstructor

#KT-17525 fixed

idea/src/org/jetbrains/kotlin/idea/quickfix/ImportFix.kt

@@ -49,6 +49,7 @@ import org.jetbrains.kotlin.idea.codeInsight.DescriptorToSourceUtilsIde
 import org.jetbrains.kotlin.idea.core.KotlinIndicesHelper
 import org.jetbrains.kotlin.idea.core.isVisible
 import org.jetbrains.kotlin.idea.imports.canBeReferencedViaImport
+import org.jetbrains.kotlin.idea.imports.importableFqName
 import org.jetbrains.kotlin.idea.project.TargetPlatformDetector
 import org.jetbrains.kotlin.idea.references.mainReference
 import org.jetbrains.kotlin.idea.util.CallTypeAndReceiver
@@ -355,7 +356,12 @@ internal class ImportConstructorReferenceFix(expression: KtSimpleNameExpression)
 
         val filterByCallType = callTypeAndReceiver.toFilter()
         // TODO Type-aliases
-        return indicesHelper.getClassesByName(expression, name).asSequence().map { it.constructors }.flatten().filter(filterByCallType).toList()
+        return indicesHelper.getClassesByName(expression, name)
+                .asSequence()
+                .map { it.constructors }.flatten()
+                .filter { it.importableFqName != null }
+                .filter(filterByCallType)
+                .toList()
     }
 
     override fun createAction(project: Project, editor: Editor, element: KtExpression): KotlinAddImportAction {

idea/testData/quickfix/autoImports/kt17525.kt

@@ -0,0 +1,11 @@
+// "class org.jetbrains.kotlin.idea.quickfix.ImportConstructorReferenceFix" "false"
+// ERROR: Unresolved reference: ItsInner
+
+
+class WithInner {
+    inner class ItsInner
+}
+
+fun referInner(p: WithInner.ItsInner) {
+    val v = p::ItsInner<caret>()
+}

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -824,6 +824,12 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             doTest(fileName);
         }
 
+        @TestMetadata("kt17525.kt")
+        public void testKt17525() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/autoImports/kt17525.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("libraryPropertyJsRuntime.kt")
         public void testLibraryPropertyJsRuntime() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/autoImports/libraryPropertyJsRuntime.kt");