[igraph] igraph_neighborhood and igraph_free

[Peter Newman]

Hello,
I'm using igraph through the C API, and I seem to have struck a problem. 
I've searched around through the bug list, archives etc, but I can't see 
anything I'm overlooking.

Basically, the vectors pointed to by the vector filled by 
igraph_neighbourhood need to be passed to igraph_free, but igraph_free 
isn't part of the API (and is only mentioned once in the manual for a 
different function). I worked out to use igraph_free by reading the 
source code for the function while finding memory leaks.

I see there is a memory.h and memory.cpp which look like an API 
implementation, but since memory.h is in the src folder, not the include 
folder, I am reluctant to use it. I'm currently getting by using GCC's 
assumption that any unknown function is an int function(void*), since 
igraph_free happens to be this.

Can anyone tell me if this is a bug, or am I overlooking something? 
Possibly a igraph_vector_ptr_t function that does the igraph_free for me?

Peter N