Fixed segfault with uninitialized action chain.

src/chain_action/action_chain_holder.h

@@ -71,6 +71,7 @@ public:
     const
     ActionChainHolder & i();
 
+    bool initialized() { return M_graph != NULL; }
 
 public:
     void setFieldEvaluator( const FieldEvaluator::ConstPtr & evaluator );

src/neck_offensive_intercept_neck.cpp

@@ -200,6 +200,11 @@ Neck_OffensiveInterceptNeck::execute( PlayerAgent * agent )
     //
     //
 
+    if ( ! ActionChainHolder::instance().initialized() )
+    {
+        return false;
+    }
+
     if ( self_min == 5
          && trap_ball_speed > wm.self().playerType().kickableArea() * 1.7 )
     {