proto_fics.cc uses strncpy in several places, but in all except one place the usage is flawed - strncpy should be used with sizeof(dest)-1 length, and the last char should be set to null, because there's no gurantee that the resulting string dest will be terminated if it's truncuted. e.g.:
strncpy(dest, src, sizeof(dest)-1)[sizeof(dest)-1]='\0';
except the first time, all places use sizeof(dest) and don't set null.
Best, imho, is to give up on strncpy and use strlcpy, which is both faster and easier to use. glib offers a version of strlcpy (named g_strlcpy), it will look like:
strlcpy(dest, src, sizeof(dest));