Minor fixes to #include directives in raster/ dir.

src/raster/gfxobj.cpp

@@ -18,13 +18,14 @@
 
 #include "config.h"
 
-#include <cstring>
-#include <map>
-#include <utility>
+#include "raster/gfxobj.h"
 
 #include "base/mutex.h"
 #include "base/scoped_lock.h"
-#include "raster/gfxobj.h"
+
+#include <cstring>
+#include <map>
+#include <utility>
 
 static Mutex* objects_mutex;
 static GfxObjId object_id = 0;		         // Last object ID created

src/raster/image.h

@@ -127,6 +127,6 @@ inline void* image_address(Image* image, int x, int y)
   return ((void *)(image->line[y] + image_line_size(image, x)));
 }
 
-#include "image_traits.h"
+#include "raster/image_traits.h"
 
 #endif

src/raster/layer.cpp

@@ -18,13 +18,13 @@
 
 #include "config.h"
 
+#include "raster/layer.h"
+
 #include "raster/blend.h"
 #include "raster/cel.h"
 #include "raster/image.h"
-#include "raster/layer.h"
 #include "raster/sprite.h"
 #include "raster/stock.h"
-#include "undo/undo_history.h"
 
 #include <algorithm>
 #include <string.h>