Fix obvious bug in KTX encoder.

third_party/ktx/ktx.cpp

Index: third_party/ktx/ktx.cpp
diff --git a/third_party/ktx/ktx.cpp b/third_party/ktx/ktx.cpp
index 08282db45355eb07307e87d14a357f1174ea0ab7..15a1c692328e4457056b684f54f254b5397e8320 100644
--- a/third_party/ktx/ktx.cpp
+++ b/third_party/ktx/ktx.cpp
@@ -422,7 +422,7 @@ bool SkKTXFile::WriteBitmapToKTX(SkWStream* stream, const SkBitmap& bitmap) {
     SkAutoLockPixels alp(bitmap);
 
     const int width = bitmap.width();
-    const int height = bitmap.width();
+    const int height = bitmap.height();
     const uint8_t* src = reinterpret_cast<uint8_t*>(bitmap.getPixels());
     if (NULL == bitmap.getPixels()) {
         return false;