Remove compiler warnings on Solaris 8.

Can go into 2.2.x, but not necessary.

Modules/_hotshot.c

@@ -1453,7 +1453,7 @@ get_version_string(void)
     char *buffer;
     int i = 0;
 
-    while (*rev && !isdigit(*rev))
+    while (*rev && !isdigit((int)*rev))
         ++rev;
     while (rev[i] != ' ' && rev[i] != '\0')
         ++i;

Modules/pyexpat.c

@@ -1366,7 +1366,7 @@ get_version_string(void)
     char *rev = rcsid;
     int i = 0;
 
-    while (!isdigit(*rev))
+    while (!isdigit((int)*rev))
         ++rev;
     while (rev[i] != ' ' && rev[i] != '\0')
         ++i;

Modules/stropmodule.c

@@ -766,7 +766,7 @@ strop_atoi(PyObject *self, PyObject *args)
 		x = (long) PyOS_strtoul(s, &end, base);
 	else
 		x = PyOS_strtol(s, &end, base);
-	if (end == s || !isalnum(end[-1]))
+	if (end == s || !isalnum((int)end[-1]))
 		goto bad;
 	while (*end && isspace(Py_CHARMASK(*end)))
 		end++;

pyconfig.h.in

@@ -106,7 +106,9 @@
 #undef __EXTENSIONS__
 
 /* This must be set to 64 on some systems to enable large file support */
+#ifndef _FILE_OFFSET_BITS
 #undef _FILE_OFFSET_BITS
+#endif
 
 /* Define if getpgrp() must be called as getpgrp(0). */
 #undef GETPGRP_HAVE_ARG