sperber's strerror fix

scsh/syscalls1.c

@@ -500,6 +500,9 @@ char *scm_gethostname(void)
 
 char *errno_msg(int i)
 {
+#ifdef HAVE_STRERROR
+    return(strerror(i));
+#else
     /* temp hack until we figure out what to do about losing sys_errlist's */
     extern
 #ifdef HAVE_CONST_SYS_ERRLIST
@@ -509,6 +512,7 @@ extern
     extern int sys_nerr;
     return ( i < 0 || i > sys_nerr ) ? NULL /* i.e., #f */
 	: (char*) sys_errlist[i];
+#endif /* !HAVE_STRERROR */
 }
 
 /* Some of fcntl()