Fix "unexpected error type" exception in initializer -> getter

So #KT-19674 Fixed

idea/src/org/jetbrains/kotlin/idea/intentions/ConvertPropertyInitializerToGetterIntention.kt

@@ -26,6 +26,7 @@ import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtProperty
 import org.jetbrains.kotlin.psi.KtPsiFactory
 import org.jetbrains.kotlin.psi.psiUtil.isExtensionDeclaration
+import org.jetbrains.kotlin.types.isError
 
 class ConvertPropertyInitializerToGetterIntention : SelfTargetingRangeIntention<KtProperty>(KtProperty::class.java, "Convert property initializer to getter") {
 
@@ -53,7 +54,9 @@ class ConvertPropertyInitializerToGetterIntention : SelfTargetingRangeIntention<
 
         fun convertPropertyInitializerToGetter(property: KtProperty, editor: Editor?) {
             val type = SpecifyTypeExplicitlyIntention.getTypeForDeclaration(property)
-            SpecifyTypeExplicitlyIntention.addTypeAnnotation(editor, property, type)
+            if (!type.isError) {
+                SpecifyTypeExplicitlyIntention.addTypeAnnotation(editor, property, type)
+            }
 
             val initializer = property.initializer!!
             val getter = KtPsiFactory(property).createPropertyGetter(initializer)

idea/testData/intentions/convertPropertyInitializerToGetter/errorType.kt

@@ -0,0 +1,8 @@
+// SKIP_ERRORS_BEFORE
+// SKIP_ERRORS_AFTER
+
+class Some
+
+class Other {
+    val x = Some<caret>
+}

idea/testData/intentions/convertPropertyInitializerToGetter/errorType.kt.after

@@ -0,0 +1,9 @@
+// SKIP_ERRORS_BEFORE
+// SKIP_ERRORS_AFTER
+
+class Some
+
+class Other {
+    val x
+        get() = Some
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -5651,6 +5651,12 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/intentions/convertPropertyInitializerToGetter"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), TargetBackend.ANY, true);
         }
 
+        @TestMetadata("errorType.kt")
+        public void testErrorType() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/convertPropertyInitializerToGetter/errorType.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("inapplicableIfExtensionProperty.kt")
         public void testInapplicableIfExtensionProperty() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/convertPropertyInitializerToGetter/inapplicableIfExtensionProperty.kt");