bugfix: if target state was found outside the recursion, we lost the flags. Thus the recursion was ignored and not unrolled due to a full cache-hit.

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/branches/bamRecursion@14034 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c