Clean up XFA code which causes warnings

xfa/fxbarcode/oned/BC_OnedCode128Reader.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 // Original code is licensed as follows:
 /*
  * Copyright 2008 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 132 matching lines @@
   for (int32_t d = 0; d < 107; d++) {
     int32_t variance = PatternMatchVariance(counters, &CODE_PATTERNS[d][0],
                                             MAX_INDIVIDUAL_VARIANCE);
     if (variance < bestVariance) {
       bestVariance = variance;
       bestMatch = d;
     }
   }
   if (bestMatch >= 0) {
     return bestMatch;
-  } else {
-    e = BCExceptionNotFound;
-    return 0;
   }
+  e = BCExceptionNotFound;
   return 0;
 }
 CFX_ByteString CBC_OnedCode128Reader::DecodeRow(int32_t rowNumber,
                                                 CBC_CommonBitArray* row,
                                                 int32_t hints,
                                                 int32_t& e) {
   CFX_Int32Array* startPatternInfo = FindStartPattern(row, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   int32_t startCode = (*startPatternInfo)[2];
   int32_t codeSet;
@@ skipping 175 matching lines @@
     } else {
       result = result.Mid(0, result.GetLength() - 1);
     }
   }
   if (result.GetLength() == 0) {
     e = BCExceptionFormatException;
     return "";
   }
   return result;
 }