win32u: Fix typo in NtUserGetIconInfo.

dlls/win32u/cursoricon.c

@@ -600,7 +600,7 @@ BOOL WINAPI NtUserGetIconInfo( HICON icon, ICONINFO *info, UNICODE_STRING *modul
             {
                 size_t size = min( res_name->MaximumLength, lstrlenW( obj->resname) * sizeof(WCHAR) );
                 if (size) memcpy( res_name->Buffer, obj->resname, size );
-                module->Length = size / sizeof(WCHAR); /* length in chars, not bytes */
+                res_name->Length = size / sizeof(WCHAR); /* length in chars, not bytes */
             }
         }
     }