gdiplus: Round up when converting from 32-bit ARGB to PARGB.

dlls/gdiplus/gdiplus.c

@@ -442,9 +442,9 @@ void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
         for (x=0; x<width; x++)
         {
             BYTE alpha=src[3];
-            *dst++ = *src++ * alpha / 255;
-            *dst++ = *src++ * alpha / 255;
-            *dst++ = *src++ * alpha / 255;
+            *dst++ = (*src++ * alpha + 127) / 255;
+            *dst++ = (*src++ * alpha + 127) / 255;
+            *dst++ = (*src++ * alpha + 127) / 255;
             *dst++ = *src++;
         }
     }

dlls/gdiplus/tests/image.c

@@ -4129,7 +4129,6 @@ static void test_ARGB_conversion(void)
     ok(data.Stride == 8, "expected 8, got %d\n", data.Stride);
     ok(data.PixelFormat == PixelFormat32bppPARGB, "expected PixelFormat32bppPARGB, got %d\n", data.PixelFormat);
     match = !memcmp(data.Scan0, pargb, sizeof(pargb));
-todo_wine
     ok(match, "bits don't match\n");
     if (!match)
     {