When a double is cast to an int, but the double has a larger value

than the int supports, it's set to 0x80000000 to indicate overflow.

msclock() is *always* overflowing, and clock_t is only 32-bits on
some platforms (specifically FreeBSD).  To "avoid" problems, just
keep subtracting UIN32_MAX from the value until it's less than INT_MAX
then cast.

This function is, of course, terrible and shouldn't actually be used,
but it should at least sorta kinda workish.

src/xpdev/genwrap.c

@@ -696,7 +696,14 @@ char* os_cmdshell(void)
 #ifdef __unix__
 clock_t msclock(void)
 {
-	return (clock_t)(xp_timer() * 1000);
+        long double t = roundl(xp_timer() * 1000);
+
+        if (sizeof(clock_t) < 8) {
+                while (t > INT32_MAX)
+                        t -= UINT32_MAX;
+        }
+
+	return (clock_t)t;
 }
 #endif