[igraph] Ask some questions about community.c

[zhmxiong]

Dear Gabor Csardi,

I have some questions about the module community.c in the R source 
package version of the latest release--igraph_0.4.3.tar.gz.

are the ids of the edges or the vectices,with which dealt  by the 
function "igraph_community_eb_get_merges" and the  
function "igraph_community_edge_betweenness",  number from zero? In 
other words,if the number of vectices in a graph is n,the ids of the 
vectices in this graph should be from zero to (n-1).

whether is it true that the vector "from" or "to" stores the vectices 
of an edge,of which ids are number from zero, in the graph 
structure "igraph_t"? Also,are the eids of edges treated by the 
module "community.c" number from zero?

I look forward to your help.

Best regards
Zhongmin xiong