Fixup minimize_monitor().

* src/tgbaalgos/minimize.cc (minimize_monitor): Fix typo yielding
incorrect monitor if the input tgba is not deterministic.
* src/tgbatest/ltl2tgba.test: Add test case.

ChangeLog

+2011-01-28  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
+
+	Fixup minimize_monitor().
+
+	* src/tgbaalgos/minimize.cc (minimize_monitor): Fix typo yielding
+	incorrect monitor if the input tgba is not deterministic.
+	* src/tgbatest/ltl2tgba.test: Add test case.
+
 2011-01-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
 
 	Report formulas that are both safety and guarantee.

src/tgbaalgos/minimize.cc

@@ -504,7 +504,7 @@ namespace spot
 
     // non_final contain all states.
     // final is empty: there is no acceptance condition
-    state_set(a, non_final);
+    state_set(det_a, non_final);
 
     return minimize_dfa(det_a, final, non_final);
   }

src/tgbatest/ltl2tgba.test

@@ -104,3 +104,11 @@ grep 'states: 5$' stdout
 ../ltl2tgba -ks -Rm -f "$f" > stdout
 grep 'transitions: 0$' stdout
 grep 'states: 1$' stdout
+
+# Make sure a monitor for F(a & F(b)) accepts everything.
+run 0 ../ltl2tgba -ks -f "$f" | grep ' ->' > stdout
+cat >expected <<EOF
+  0 -> 1
+  1 -> 1 [label="1\n"]
+EOF
+cmp stdout expected