Simplify handling of inheritance in SplFixedArray

After the loop, `parent` will for sure be ce_SplFixedArray, and
inherited will be true; for inherited cases.

Author: ndossche

ext/spl/spl_fixedarray.c

@@ -278,7 +278,6 @@ static zend_object *spl_fixedarray_object_new_ex(zend_class_entry *class_type, z
 {
 	spl_fixedarray_object *intern;
 	zend_class_entry      *parent = class_type;
-	bool                   inherited = false;
 
 	intern = zend_object_alloc(sizeof(spl_fixedarray_object), parent);
 
@@ -290,21 +289,10 @@ static zend_object *spl_fixedarray_object_new_ex(zend_class_entry *class_type, z
 		spl_fixedarray_copy_ctor(&intern->array, &other->array);
 	}
 
-	while (parent) {
-		if (parent == spl_ce_SplFixedArray) {
-			break;
-		}
-
-		parent = parent->parent;
-		inherited = true;
-	}
-
-	ZEND_ASSERT(parent);
-
-	if (UNEXPECTED(inherited)) {
+	if (UNEXPECTED(class_type != spl_ce_SplFixedArray)) {
 		/* Find count() method */
 		zend_function *fptr_count = zend_hash_find_ptr(&class_type->function_table, ZSTR_KNOWN(ZEND_STR_COUNT));
-		if (fptr_count->common.scope == parent) {
+		if (fptr_count->common.scope == spl_ce_SplFixedArray) {
 			fptr_count = NULL;
 		}
 		intern->fptr_count = fptr_count;