use simpler way to get length of an array

src/embind/emval.js

@@ -70,15 +70,6 @@ function __emval_get_property_by_unsigned_long(handle, k) {
     return __emval_register(_emval_handle_array[handle].value[k]);
 }
 
-function __emval_get_length(handle) {
-    var val = _emval_handle_array[handle].value;
-    if (Object.prototype.toString.call(val) === "[object Array]") {
-        return val.length;
-    }
-
-    return 0;
-}
-
 function __emval_eval_global_method(handle, objectName, methodName) {
     var objectNameStr = Pointer_stringify(objectName);
     var methodNameStr = Pointer_stringify(methodName);

system/include/emscripten/val.h

@@ -21,7 +21,6 @@ namespace emscripten {
             EM_VAL _emval_eval_global_method(EM_VAL object, const char* objectName, const char* methodName);
             void _emval_set_property(EM_VAL object, const char* key, EM_VAL value);
             void _emval_set_property_by_int(EM_VAL object, long key, EM_VAL value);
-            unsigned int _emval_get_length(EM_VAL object);
             void _emval_as(EM_VAL value, TYPEID returnType);
             EM_VAL _emval_call(
                 EM_VAL value,
@@ -118,7 +117,7 @@ namespace emscripten {
         }
 
         unsigned int length() {
-            return internal::_emval_get_length(handle);
+            return get("length").as<unsigned int>();
         }
 
         template<typename ...Args>