Added possibility of internal pegs. It can break the system however

Samo Penic

2016-07-11 e984829db39b2778e4f66c34524329ad09749c45

 src/frame.h

@@ -1,3 +1,4 @@
/* vim: set ts=4 sts=4 sw=4 noet : */
#ifndef _H_FRAME
#define _H_FRAME
ts_bool centermass(ts_vesicle *vesicle);