[gobject-introspection] Revert "block can be None, fixup last commit"

[Johan Dahlin <johan src gnome org>]

commit 57213017a4e3c79d8f690097c67b403690c39def
Author: Johan Dahlin <johan gnome org>
Date:   Wed Oct 6 11:26:33 2010 -0300

    Revert "block can be None, fixup last commit"
    
    This reverts commit 754e5462f6dfbe3793eb959abf3dbfa7d2fe6435.

 giscanner/maintransformer.py |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/giscanner/maintransformer.py b/giscanner/maintransformer.py
index a55fdf4..9053abf 100644
--- a/giscanner/maintransformer.py
+++ b/giscanner/maintransformer.py
@@ -411,10 +411,9 @@ usage is void (*_gtk_reserved1)(void);"""
                 "Unknown container %r for element-type annotation" % (node.type, ))
 
     def _apply_annotations_enum(self, node, block):
-        if block:
-            enum_type = block.options.get(OPT_TYPE)
-            if enum_type and enum_type.one() == 'bitfield':
-                node.__class__ = ast.Bitfield
+        enum_type = block.options.get(OPT_TYPE)
+        if enum_type and enum_type.one() == 'bitfield':
+            node.__class__ = ast.Bitfield
         self._apply_annotations_annotated(node, block)
 
     def _get_transfer_default_param(self, parent, node):