Download CVE images instead of storing them on disk

Tests/check_tiff_crashes.py

@@ -14,15 +14,19 @@
 # version.
 
 
+import urllib.request
+
 from PIL import Image
 
 repro_read_strip = (
-    "images/crash_1.tif",
-    "images/crash_2.tif",
+    "crash_1.tif",
+    "crash_2.tif",
 )
 
 for path in repro_read_strip:
-    with Image.open(path) as im:
+    repo = "https://raw.githubusercontent.com/python-pillow/Pillow/master/"
+    with urllib.request.urlopen(repo + "Tests/images/" + path) as f:
+        with Image.open(f) as im:
             try:
                 im.load()
             except Exception as msg: