Merge branch 'develop' of github.com:olk/boost-fiber into develop

include/boost/fiber/fiber_context.hpp

@@ -331,7 +331,7 @@ public:
     void resume() {
         BOOST_ASSERT( is_running() ); // set by the scheduler-algorithm
 
-        ctx_.resume();
+        ctx_();
     }
 
     std::chrono::high_resolution_clock::time_point const& time_point() const noexcept {

src/round_robin.cpp

@@ -36,7 +36,7 @@ round_robin::pick_next() {
 
 std::size_t
 round_robin::ready_fibers() const noexcept {
-    return rqueue_.empty();
+    return rqueue_.size();
 }
 
 }}