Fixed exception in getUastLocation of class annotation argument

#KT-16326 Fixed

plugins/uast-kotlin/src/org/jetbrains/uast/kotlin/declarations/KotlinUClass.kt

@@ -43,6 +43,9 @@ class KotlinUClass private constructor(
         return super.getOriginalElement()
     }
 
+    override val annotations: List<UAnnotation>
+        get() = ktClass?.annotationEntries?.map { KotlinUAnnotation(it, this) } ?: emptyList()
+
     override val uastAnchor: UElement
         get() = UIdentifier(psi.nameIdentifier, this)