Do not assert when a firmware file is not found.

diff --git a/Cura/util/resources.py b/Cura/util/resources.py
index 6c38576398db5a26d5685c99301e0e12b465632f..59592fb173f210f83ed25536e8057deffd0543ea 100644 (file)
--- a/Cura/util/resources.py
+++ b/Cura/util/resources.py
@@ -32,7 +32,8 @@ else:
 def getPathForResource(dir, subdir, resource_name):
        assert os.path.isdir(dir), "{p} is not a directory".format(p=dir)
        path = os.path.normpath(os.path.join(dir, subdir, resource_name))
-       assert os.path.isfile(path), "{p} is not a file.".format(p=path)
+       if not os.path.isfile(path):
+               return None
        return path
 
 def getPathForImage(name):