Fix a bug in "example1" test.
Fix a bug in "example1" test.

If the runtime part encountered a bug and return a nonzero value,
the main test printed an error message, but continued and printed
whatever garbage was in the uninitialized output buffers.

pocl/pocl,vkorhonen/pocl,pocl/pocl,pocl/pocl,dsandersimgtec/pocl,dsandersimgtec/pocl,pavanky/pocl,pavanky/pocl,franz/pocl,franz/pocl,pavanky/pocl,dsandersimgtec/pocl,jrprice/pocl,vkorhonen/pocl,vkorhonen/pocl,jrprice/pocl,Oblomov/pocl,vkorhonen/pocl,pocl/pocl,Oblomov/pocl,franz/pocl,dsandersimgtec/pocl,franz/pocl,jrprice/pocl,rjodin/pocl,rjodin/pocl,jrprice/pocl,rjodin/pocl,Oblomov/pocl,Oblomov/pocl,franz/pocl,Oblomov/pocl,pavanky/pocl,rjodin/pocl,pocl/pocl