gdiplus: Remove superfluous pointer casts.
diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index b19c7bb..5193334 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -3229,7 +3229,7 @@
 
     m = *(graphics->worldtrans);
 
-    ret = GdipMultiplyMatrix(&m, (GpMatrix*)matrix, order);
+    ret = GdipMultiplyMatrix(&m, matrix, order);
     if(ret == Ok)
         *(graphics->worldtrans) = m;