Tiny type demotion to remove deser-side dependency

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/deser/BasicDeserializerFactory.java

@@ -251,7 +251,7 @@ protected ValueInstantiator _constructDefaultValueInstantiator(DeserializationCo
         final ConstructorDetector ctorDetector;
 
         {
-            final DeserializationConfig config = ctxt.getConfig();
+            final MapperConfig<?> config = ctxt.getConfig();
             // need to construct suitable visibility checker:
             final VisibilityChecker<?> vchecker = config.getDefaultVisibilityChecker(beanDesc.getBeanClass(),
                     beanDesc.getClassInfo());