add CS_OPT_UNSIGNED option to print immediate in unsigned form. only ARM is supported for now (issue #585)
diff --git a/cs_priv.h b/cs_priv.h
index 7818cd2..bb7cb0d 100644
--- a/cs_priv.h
+++ b/cs_priv.h
@@ -63,7 +63,7 @@
 	PostPrinter_t post_printer;
 	cs_err errnum;
 	ARM_ITStatus ITBlock;	// for Arm only
-	cs_opt_value detail;
+	cs_opt_value detail, imm_unsigned;
 	int syntax;	// asm syntax for simple printer such as ARM, Mips & PPC
 	bool doing_mem;	// handling memory operand in InstPrinter code
 	unsigned short *insn_cache;	// index caching for mapping.c