More valgrind appeasement

src/gpu/effects/GrBitmapTextGeoProc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBitmapTextGeoProc.h"
 #include "GrInvariantOutput.h"
 #include "GrTexture.h"
@@ skipping 161 matching lines @@
         SkShader::kRepeat_TileMode,
         SkShader::kMirror_TileMode,
     };
     SkShader::TileMode tileModes[] = {
         kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
         kTileModes[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
     };
     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;
             break;
         case 1:
             format = kA565_GrMaskFormat;
             break;
         case 2:
             format = kARGB_GrMaskFormat;
             break;
     }
 
     return GrBitmapTextGeoProc::Create(GrRandomColor(d->fRandom), d->fTextures[texIdx], params,
                                        format, GrTest::TestMatrix(d->fRandom),
                                        d->fRandom->nextBool());
 }