Fixed a compiler error in AppCanvas.h (thanks paulhart2). Also fixed

a compiler warning in pipeline.c with regard to the missing prototype 
definition of free_libblock().

source/blender/freestyle/intern/application/AppCanvas.h

@@ -40,7 +40,7 @@ public:
   /*! accessors */
   virtual int width() const ;
   virtual int height() const ;
-  virtual BBox<Vec2i> AppCanvas::border() const ;
+  virtual BBox<Vec2i> border() const ;
 
 	AppView *_pViewer;
   inline const AppView * viewer() const {return _pViewer;}

source/blender/render/intern/source/pipeline.c

@@ -42,6 +42,7 @@
 #include "BKE_utildefines.h"
 #include "BKE_global.h"
 #include "BKE_image.h"
+#include "BKE_library.h"
 #include "BKE_main.h"
 #include "BKE_node.h"
 #include "BKE_object.h"