Fix extraneous output generation
Xsmith will always output the ;; !!! The following output was captured during execution:
line even if no output was captured. This is likely an error introduced by me when I rewrote the output capturing stuff.
Xsmith will always output the ;; !!! The following output was captured during execution:
line even if no output was captured. This is likely an error introduced by me when I rewrote the output capturing stuff.