Fix BMP RLE bug

src/codec/SkBmpRLECodec.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBmpRLECodec.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
@@ skipping 331 matching lines @@
         const uint8_t task = fStreamBuffer.get()[fCurrRLEByte++];
 
         // Perform decoding
         if (RLE_ESCAPE == flag) {
             switch (task) {
                 case RLE_EOL:
                     x = 0;
                     y++;
                     break;
                 case RLE_EOF:
-                    return kSuccess;
+                    return y;
                 case RLE_DELTA: {
                     // Two bytes are needed to specify delta
                     if ((int) fRLEBytes - fCurrRLEByte < 2) {
                         SkCodecPrintf("Warning: might be incomplete RLE input.\n");
                         if (this->checkForMoreData() < 2) {
                             return y;
                         }
                     }
                     // Modify x and y
                     const uint8_t dx = fStreamBuffer.get()[fCurrRLEByte++];
@@ skipping 142 matching lines @@
         fSampler.reset(new SkBmpRLESampler(this));
     }
 
     return fSampler;
 }
 
 int SkBmpRLECodec::setSampleX(int sampleX){
     fSampleX = sampleX;
     return get_scaled_dimension(this->getInfo().width(), sampleX);
 }