Implement HasSegReg() method.

Former-commit-id: 99d63b7a6f1274d935725e3f7a1f70ba3d36479b

include/interfaces/irdb/STARSOp.h

@@ -198,7 +198,7 @@ class STARS_IRDB_op_t : public STARS_op_t
 		}
 		virtual bool IsNearPointer(void) const { return OpType==op_Addr; }
 		virtual bool IsFarPointer(void) const { return false; }
-		virtual bool HasSegReg(void) const { assert(0); } // Has a segment register
+		virtual bool HasSegReg(void) const { return (SegReg != STARS_x86_R_none); } // Has a segment register
 
 
 // conversion of op to new type