- int inbi, *displs = NULL;
- char *tmpsend = NULL, *tmprecv = NULL, *accumbuf = NULL, *accumbuf_free = NULL;
- char *inbuf_free[2] = {NULL, NULL}, *inbuf[2] = {NULL, NULL};
+ int inbi;
+ unsigned char *tmpsend = nullptr, *tmprecv = nullptr, *accumbuf = nullptr, *accumbuf_free = nullptr;
+ unsigned char *inbuf_free[2] = {nullptr, nullptr}, *inbuf[2] = {nullptr, nullptr};