gdiplus: Added ImageAttributes stubs.

include/gdiplusenums.h

diff --git a/include/gdiplusenums.h b/include/gdiplusenums.h
index ac9de4b..2d3c229 100644
--- a/include/gdiplusenums.h
+++ b/include/gdiplusenums.h
@@ -164,6 +164,15 @@
     ImageTypeMetafile
 };
 
+enum WrapMode
+{
+    WrapModeTile,
+    WrapModeTileFlipX,
+    WrapModeTileFlipY,
+    WrapModeTileFlipXY,
+    WrapModeClamp
+};
+
 #ifndef __cplusplus
 
 typedef enum Unit Unit;
@@ -181,6 +190,7 @@
 typedef enum DashStyle DashStyle;
 typedef enum MatrixOrder MatrixOrder;
 typedef enum ImageType ImageType;
+typedef enum WrapMode WrapMode;
 
 #endif /* end of c typedefs */