Fix T51140: FBX import fails to read file exported from Max.

Usual crap with PoS of FBX... feeling bad though, that report skipped
out of my radar for too long. :|

io_scene_fbx/__init__.py

@@ -21,7 +21,7 @@
 bl_info = {
     "name": "FBX format",
     "author": "Campbell Barton, Bastien Montagne, Jens Restemeier",
-    "version": (4, 14, 1),
+    "version": (4, 14, 2),
     "blender": (2, 80, 0),
     "location": "File > Import-Export",
     "description": "FBX IO meshes, UV's, vertex colors, materials, textures, cameras, lamps and actions",

io_scene_fbx/import_fbx.py

@@ -252,9 +252,9 @@ def elem_props_get_bool(elem, elem_prop_id, default=None):
     elem_prop = elem_props_find_first(elem, elem_prop_id)
     if elem_prop is not None:
         assert(elem_prop.props[0] == elem_prop_id)
-        assert(elem_prop.props[1] == b'bool')
+        # b'Bool' with a capital seems to be used for animated property... go figure...
+        assert(elem_prop.props[1] in {b'bool', b'Bool'})
         assert(elem_prop.props[2] == b'')
-        assert(elem_prop.props[3] == b'')
 
         # we could allow other number types
         assert(elem_prop.props_type[4] == data_types.INT32)