More valgrind appeasement

src/gpu/effects/GrBitmapTextGeoProc.cpp

Index: src/gpu/effects/GrBitmapTextGeoProc.cpp
diff --git a/src/gpu/effects/GrBitmapTextGeoProc.cpp b/src/gpu/effects/GrBitmapTextGeoProc.cpp
index 18f12bdfa51d8c5ebd6dbbe83c5469c07b8e2445..b5bae466fd0e9287ec60ebf387ebdb2e95a72be9 100644
--- a/src/gpu/effects/GrBitmapTextGeoProc.cpp
+++ b/src/gpu/effects/GrBitmapTextGeoProc.cpp
@@ -179,7 +179,7 @@ const GrGeometryProcessor* GrBitmapTextGeoProc::TestCreate(GrProcessorTestData*
     GrTextureParams params(tileModes, d->fRandom->nextBool() ? GrTextureParams::kBilerp_FilterMode :
                                                            GrTextureParams::kNone_FilterMode);
 
-    GrMaskFormat format;
+    GrMaskFormat format = kARGB_GrMaskFormat; // init to avoid warning
     switch (d->fRandom->nextULessThan(3)) {
         case 0:
             format = kA8_GrMaskFormat;