* configure.in, tm-amix.h, tm-i386v4.h, xm-amix.h, xm-i386v4.h:

* configure.in, tm-amix.h, tm-i386v4.h, xm-amix.h, xm-i386v4.h:
Change svr4 references to sysv4.

* source.c:  Move declaration of external function index to
front of file so it is in scope for all references.

* utils.c (error, fatal):  Make definitions consistent with
defs.h declarations (declared as "volatile void").