rewrote stix_bitandints(), stix_bitorints(), stix_bitxorints() to handle negative numbers in the 2's complement form

stix/lib/obj.c

@@ -26,7 +26,7 @@
 
 #include "stix-prv.h"
 
-void* stix_allocbytes (stix_t* stix, stix_size_t size)
+void* stix_allocbytes (stix_t* stix, stix_oow_t size)
 {
 	stix_uint8_t* ptr;