Never claim output used to print the degeneralized automaton

before some optional operations (like more optimizations, or a
product).

* src/tgbatest/ltl2tgba.cc (-N, -NN): Make sure we print the last
automaton computed, not just the automaton when we degeneralized
it.  We may have applied other algorithms since the original
degeneralization.

ChangeLog

+2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
+
+	Never claim output used to print the degeneralized automaton
+	before some optional operations (like more optimizations, or a
+	product).
+
+	* src/tgbatest/ltl2tgba.cc (-N, -NN): Make sure we print the last
+	automaton computed, not just the automaton when we degeneralized
+	it.  We may have applied other algorithms since the original
+	degeneralization.
+
 2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
 
 	* src/tgbatest/ltl2tgba.test: Test both -l and -f.  This should

src/tgbatest/ltl2tgba.cc

@@ -1043,8 +1043,18 @@ main(int argc, char** argv)
 	      {
 		assert(degeneralize_opt == DegenSBA);
 		const spot::tgba_sba_proxy* s =
-		  static_cast<const spot::tgba_sba_proxy*>(degeneralized);
-		spot::never_claim_reachable(std::cout, s, f, spin_comments);
+		  dynamic_cast<const spot::tgba_sba_proxy*>(a);
+		if (s)
+		  spot::never_claim_reachable(std::cout, s, f, spin_comments);
+		else
+		  {
+		    // It is possible that we have applied other
+		    // operations to the automaton since its initial
+		    // degeneralization.  Let's degeneralize again!
+		    s = new spot::tgba_sba_proxy(a);
+		    spot::never_claim_reachable(std::cout, s, f, spin_comments);
+		    delete s;
+		  }
 		break;
 	      }
 	    case 9: