gdiplus: Remove superfluous pointer casts.

dlls/gdiplus/graphics.c

@@ -3229,7 +3229,7 @@ GpStatus WINGDIPAPI GdipMultiplyWorldTransform(GpGraphics *graphics, GDIPCONST G
 
     m = *(graphics->worldtrans);
 
-    ret = GdipMultiplyMatrix(&m, (GpMatrix*)matrix, order);
+    ret = GdipMultiplyMatrix(&m, matrix, order);
     if(ret == Ok)
         *(graphics->worldtrans) = m;
 

dlls/gdiplus/image.c

@@ -1180,7 +1180,7 @@ static GpStatus encode_image_BMP(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
 
     *output = GdipAlloc(*output_size);
 
-    bmp_file_hdr = (BITMAPFILEHEADER*) *output;
+    bmp_file_hdr = *output;
     bmp_file_hdr->bfType = BITMAP_FORMAT_BMP;
     bmp_file_hdr->bfSize = *output_size;
     bmp_file_hdr->bfOffBits =

dlls/gdiplus/tests/image.c

@@ -455,7 +455,7 @@ static void test_GdipCreateBitmapFromHBITMAP(void)
     LogPal = GdipAlloc(sizeof(LOGPALETTE));
     ok(LogPal != NULL, "unable to allocate LOGPALETTE\n");
     LogPal->palVersion = 0x300;
-    hpal = CreatePalette((const LOGPALETTE*) LogPal);
+    hpal = CreatePalette(LogPal);
     ok(hpal != NULL, "CreatePalette failed\n");
     GdipFree(LogPal);