#7 Clepsydra throws NPE if loop is missing goto instruction

[Trevor Harmon]

Clepsydra will throw a NullPointerException if a loop node has no goto instruction. Here are some examples of loops without a goto:

while (val > 3)
if (b) return;

while (b)
{
if (val > 10)
b = true;
else
return -1;
}

while (b)
while (b);

Make sure that the WCET result is correct for these cases, as well. Add them as test cases.