src/__init__.py: fix to work with latest mupdf 1.24.8.

Commit d4e216c updated the
fns to call fz_document_handler fnprts and they have now been
backported to the 1.24.x branch so here we accommodate for that.

Author: sebras

src/__init__.py

@@ -2818,7 +2818,7 @@ def __init__(self, filename=None, stream=None, filetype=None, rect=None, width=0
                                         stream = mupdf.FzStream(filename)
                                         accel = mupdf.FzStream()
                                         archive = mupdf.FzArchive(None)
-                                        if mupdf_version_tuple >= (1, 25):
+                                        if mupdf_version_tuple >= (1, 24, 8):
                                             doc = mupdf.ll_fz_document_handler_open(
                                                     handler,
                                                     stream.m_internal,