Minor, refine return type of AbstractClassTypeConstructor.getDeclarationDescriptor

compiler/frontend/src/org/jetbrains/kotlin/psi/synthetics/SyntheticClassOrObjectDescriptor.kt

@@ -116,7 +116,7 @@ class SyntheticClassOrObjectDescriptor(
         override fun getParameters(): List<TypeParameterDescriptor> = emptyList()
         override fun isFinal(): Boolean = true
         override fun isDenotable(): Boolean = true
-        override fun getDeclarationDescriptor(): ClassifierDescriptor = thisDescriptor
+        override fun getDeclarationDescriptor(): ClassDescriptor = thisDescriptor
         override fun computeSupertypes(): Collection<KotlinType> = syntheticSupertypes
         override val supertypeLoopChecker: SupertypeLoopChecker = SupertypeLoopChecker.EMPTY
     }

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassDescriptor.java

@@ -662,7 +662,7 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
 
         @Override
         @NotNull
-        public ClassifierDescriptor getDeclarationDescriptor() {
+        public ClassDescriptor getDeclarationDescriptor() {
             return LazyClassDescriptor.this;
         }