fix for use of uninit variable

src/gpu/GrBitmapTextContext.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 "GrBitmapTextContext.h"
 #include "GrAtlas.h"
 #include "GrDefaultGeoProcFactory.h"
@@ skipping 530 matching lines @@
     unsigned g = SkColorGetG(c);
     unsigned b = SkColorGetB(c);
     return GrColorPackRGBA(r, g, b, 0xff);
 }
 
 void GrBitmapTextContext::flush() {
     if (NULL == fDrawTarget) {
         return;
     }
 
-    GrDrawState drawState;
-    drawState.setFromPaint(fPaint, SkMatrix::I(), fContext->getRenderTarget());
+    if (fCurrVertex > 0) {
+        GrDrawState drawState;
+        drawState.setFromPaint(fPaint, SkMatrix::I(), fContext->getRenderTarget());
 
-    set_vertex_attributes(&drawState, fCurrMaskFormat);
+        set_vertex_attributes(&drawState, fCurrMaskFormat);
 
-    if (fCurrVertex > 0) {
         // setup our sampler state for our text texture/atlas
         SkASSERT(SkIsAlign4(fCurrVertex));
         SkASSERT(fCurrTexture);
         GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kNone_FilterMode);
 
         // This effect could be stored with one of the cache objects (atlas?)
         if (kARGB_GrMaskFormat == fCurrMaskFormat) {
             drawState.setGeometryProcessor(GrDefaultGeoProcFactory::Create(true))->unref();
             GrFragmentProcessor* fragProcessor = GrSimpleTextureEffect::Create(fCurrTexture,
                                                                                SkMatrix::I(),
@@ skipping 70 matching lines @@
     }
 }
 
 inline void GrBitmapTextContext::finish() {
     this->flush();
     fTotalVertexCount = 0;
 
     GrTextContext::finish();
 }