[Finder] fix wrong method call casing

Author: azjezz

Iterator/SortableIterator.php

@@ -39,7 +39,7 @@ public function __construct(\Traversable $iterator, $sort)
 
         if (self::SORT_BY_NAME === $sort) {
             $this->sort = function ($a, $b) {
-                return strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
+                return strcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
             };
         } elseif (self::SORT_BY_TYPE === $sort) {
             $this->sort = function ($a, $b) {
@@ -49,7 +49,7 @@ public function __construct(\Traversable $iterator, $sort)
                     return 1;
                 }
 
-                return strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
+                return strcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
             };
         } elseif (self::SORT_BY_ACCESSED_TIME === $sort) {
             $this->sort = function ($a, $b) {