Restore check for Array<T> type argument

java/kotlin-extractor/src/main/kotlin/KotlinExtractorExtension.kt

@@ -509,7 +509,7 @@ class X {
 }
 */
 
-            s.isBoxedArray || s.isPrimitiveArray() -> {
+            (s.isBoxedArray && s.arguments.isNotEmpty()) || s.isPrimitiveArray() -> {
                 // TODO: fix this, this is only a dummy implementation to let the tests pass
                 // TODO: Figure out what signatures should be returned
                 // TODO: Generate a short name for array types