Fix bug in blitAntiH

src/utils/SkTextureCompressor_Blitter.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkTextureCompressor_Blitter_DEFINED
 #define SkTextureCompressor_Blitter_DEFINED
 
@@ skipping 388 matching lines @@
                 }
             }
 
             finalX = 0xFFFFF;
             for (int i = 0; i < BlockDim; ++i) {
                 finalX = SkMin32(nextX[i], finalX);
             }
         }
 
         // If we didn't land on a block boundary, output the block...
-        if ((curX % BlockDim) > 1) {
+        if ((curX % BlockDim) > 0) {
+#ifdef SK_DEBUG
+            for (int i = 0; i < BlockDim; ++i) {
+                SkASSERT(nextX[i] == kLongestRun || nextX[i] == curX);
+            }
+#endif
+            const int col = curX % BlockDim;
+            const int colsLeft = BlockDim - col;
+
+            memset(curAlphaColumn, 0, sizeof(curAlphaColumn));
+            this->updateBlockColumns(block, col, colsLeft, curAlphaColumn);
+
             CompressorType::CompressA8Vertical(outPtr, reinterpret_cast<uint8_t*>(block));
         }
 
         fNextRun = 0;
     }
 };
 
 }  // namespace SkTextureCompressor
 
 #endif  // SkTextureCompressor_Blitter_DEFINED