be2utils: fix bug in call graph edges

Author: williballenthin

pylancelot/python/lancelot/be2utils/__init__.py

@@ -81,11 +81,6 @@ def get_basic_block_address(self, basic_block_index: int) -> int:
 
     def _index_vertex_edges(self):
         for edge in self.be2.call_graph.edge:
-            if not edge.source_vertex_index:
-                continue
-            if not edge.target_vertex_index:
-                continue
-
             self.callers_by_vertex_index[edge.target_vertex_index].append(edge.source_vertex_index)
             self.callees_by_vertex_index[edge.source_vertex_index].append(edge.target_vertex_index)