match.c (lock_unlock_statement, [...]): Fix potential double freeing.

2012-09-15  Tobias Burnus  <burnus@net-b.de>

        * match.c (lock_unlock_statement, sync_statement): Fix potential
        double freeing.
        (sync_statement): Remove unreachable code.
        * simplify.c (gfc_simplify_bessel_n2): Avoid double freeing.
        (gfc_simplify_repeat): Remove bogus code.
        * target-memory.h (gfc_target_encode_expr): Update prototype.
        * target-memory.c (gfc_target_encode_expr, encode_array,
        encode_derived): Return unsigned HOST_WIDE_INT.
        (gfc_target_interpret_expr): Add assert.
        (gfc_merge_initializers): Fix "== 0" check for mpz_t.
        * symbol.c (gfc_get_typebound_proc): Add assert.
        (gfc_merge_initializers): Remove unreachable check.

From-SVN: r191343