Removes warnings generated by gcc and clang.



git-svn-id: http://skia.googlecode.com/svn/trunk@2651 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGr.cpp b/src/gpu/SkGr.cpp
index 6fe8292..6a39410 100644
--- a/src/gpu/SkGr.cpp
+++ b/src/gpu/SkGr.cpp
@@ -76,7 +76,7 @@
         kNone_GrAALevel,
         bitmap->width(),
         bitmap->height(),
-        SkGr::Bitmap2PixelConfig(*bitmap)
+        { SkGr::Bitmap2PixelConfig(*bitmap) }
     };
 
     if (SkBitmap::kIndex8_Config == bitmap->config()) {