fix example fibonacci

doc/callcc.qbk

@@ -86,12 +86,12 @@ A contiunation is continued by appling to function `resume()`.
                 return std::move(sink);
             });
         for (int j=0;j<10;++j) {
-            source=ctx::resume(std::move(source));
             std::cout << ctx::transfer_data<int>(source) << " ";
+            source=ctx::resume(std::move(source));
         }
 
         output:
-            1 1 2 3 5 8 13 21 34 55
+            0 1 1 2 3 5 8 13 21 34 55
 
 This simple example demonstrates the basic usage of __callcc__ as a generator.
 The continuation `sink` represents the ['main]-continuation (function `main()`).

example/callcc/fibonacci.cpp

@@ -26,8 +26,8 @@ int main() {
             return std::move( c);
         });
     for ( int j = 0; j < 10; ++j) {
-        c=ctx::resume(std::move(c));
         std::cout << ctx::transfer_data<int>(c) << " ";
+        c=ctx::resume(std::move(c));
     }
     std::cout << std::endl;
     std::cout << "main: done" << std::endl;