XFA: Revert UTF16LE_Encode changes

core/src/fxcrt/fx_basic_wstring.cpp

Index: core/src/fxcrt/fx_basic_wstring.cpp
diff --git a/core/src/fxcrt/fx_basic_wstring.cpp b/core/src/fxcrt/fx_basic_wstring.cpp
index 7ea7e8e11244477841d80ebe7c93d292bda35d78..220ffbd57dad029884997333412f4085a04bf959 100644
--- a/core/src/fxcrt/fx_basic_wstring.cpp
+++ b/core/src/fxcrt/fx_basic_wstring.cpp
@@ -287,17 +287,19 @@ CFX_ByteString CFX_WideString::UTF8Encode() const {
   return FX_UTF8Encode(*this);
 }
 CFX_ByteString CFX_WideString::UTF16LE_Encode() const {
-  CFX_ByteString result;
-  if (!m_pData) {
-    return result;
+  if (m_pData == NULL) {
+    return CFX_ByteString(FX_BSTRC("\0\0"));
   }
   int len = m_pData->m_nDataLength;
-  FX_CHAR* buffer = result.GetBuffer(len * 2);
-  for (int i = 0; i < len; ++i) {
+  CFX_ByteString result;
+  FX_CHAR* buffer = result.GetBuffer(len * 2 + 2);
+  for (int i = 0; i < len; i++) {
     buffer[i * 2] = m_pData->m_String[i] & 0xff;
     buffer[i * 2 + 1] = m_pData->m_String[i] >> 8;
   }
-  result.ReleaseBuffer(len * 2);
+  buffer[len * 2] = 0;
+  buffer[len * 2 + 1] = 0;
+  result.ReleaseBuffer(len * 2 + 2);
   return result;
 }
 void CFX_WideString::ConvertFrom(const CFX_ByteString& str,