src/ tests/: Fix bug in Page.get_bboxlog().

src/__init__.py:
    Fix JM_new_bbox_device_Device; member fns begin_layer() and end_layer()
    were incorrectly defined.
tests/:
    Add test_bboxlog_2885(), exposed problem in JM_new_bbox_device_Device's
    begin_layer() and end_layer() callbacks.

src/__init__.py

@@ -19133,8 +19133,8 @@ def __init__(self, result, layers):
         self.use_virtual_begin_layer()
         self.use_virtual_end_layer()
 
-        self.begin_layer = jm_lineart_begin_layer
-        self.end_layer = jm_lineart_end_layer
+    begin_layer = jm_lineart_begin_layer
+    end_layer = jm_lineart_end_layer
 
     fill_path = jm_bbox_fill_path
     stroke_path = jm_bbox_stroke_path

tests/test_general.py

@@ -801,3 +801,9 @@ def test_3070():
       links[0]['uri'] = "https://www.ddg.gg"
       pdf[0].update_link(links[0])
       pdf.save(os.path.abspath(f'{__file__}/../../tests/test_3070_out.pdf'))
+
+def test_bboxlog_2885():
+    doc = fitz.open(os.path.abspath(f'{__file__}/../../tests/resources/test_2885.pdf'))
+    page=doc[0]
+    bbl = page.get_bboxlog()
+    bbl = page.get_bboxlog(layers=True)