insertion of mutant4

mutants/mutant-4/swen90006/machine/Machine.java

@@ -275,7 +275,7 @@ public class Machine
 	}
 	int ra = parseReg(toks[1]);
 	int offs = parseOffset(toks[2]);
-	if (regs[ra] == 0){
+	if (regs[ra] > 0){
 	  pc = pc + offs;
 	}else{
 	  pc = pc + 1;