Fix failures detected on MacOS X with g++ 4.0.

* src/tgbaalgos/cycles.hh (state_info): Initialize
mark and reach to false.
* src/tgbatest/cycles.test: Use jot if seq is missing,
and a custom loop of jot is missing too.

src/tgbaalgos/cycles.hh

@@ -85,6 +85,10 @@ namespace spot
     // Extra information required for the algorithm for each state.
     struct state_info
     {
+      state_info()
+	: reach(false), mark(false)
+      {
+      }
       // Whether the state has already left the stack at least once.
       bool reach;
       // set to true when the state current state w is stacked, and