Fix trivial error in node/edge search functions

src/graph_tool/util/__init__.py

@@ -25,20 +25,20 @@ __all__ = ["find_vertex", "find_vertex_range", "find_edge", "find_edge_range"]
 
 def find_vertex(g, deg, match):
     ret = libgraph_tool_util.\
-          find_vertex_range(g._Graph__graph, _degree(deg), (match, match))
+          find_vertex_range(g._Graph__graph, _degree(g, deg), (match, match))
     return ret
 
 def find_vertex_range(g, deg, range):
     ret = libgraph_tool_util.\
-          find_vertex_range(g._Graph__graph, _degree(deg), range)
+          find_vertex_range(g._Graph__graph, _degree(g, deg), range)
     return ret
 
 def find_edge(g, prop, match):
     ret = libgraph_tool_util.\
-          find_edge_range(g._Graph__graph, _prop(prop,"e"), (match, match))
+          find_edge_range(g._Graph__graph, _prop("e", g, prop), (match, match))
     return ret
 
 def find_edge_range(g, prop, range):
     ret = libgraph_tool_util.\
-          find_edge_range(g._Graph__graph, _prop(prop,"e"), range)
+          find_edge_range(g._Graph__graph, _prop("e", g, prop), range)
     return ret