Add script to check that icons have correct size

Change-Id: I7c17ff1379d744378accd3c08c72f17f6ac6f545

bin/check-icon-sizes.py

+#!/usr/bin/env python3
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+import os
+
+from PIL import Image
+
+"""
+This script walks through all icon files and checks whether the sc_* and lc_* files have the correct size.
+"""
+
+icons_folder = os.path.abspath(os.path.join(__file__, '..', '..', 'icon-themes'))
+
+def check_size(filename, size):
+    image = Image.open(filename)
+    width, height = image.size
+    if width != size or height != size:
+        print("%s has size %dx%d but should have %dx%d" % (filename, width, height, size, size))
+
+for root, dirs, files in os.walk(icons_folder):
+    for filename in files:
+        if not filename.endswith('png'):
+            continue
+        if filename.startswith('lc_'):
+            check_size(os.path.join(root, filename), 24)
+        elif filename.startswith('sc_'):
+            check_size(os.path.join(root, filename), 16)
+