Change colorspace's number of components to be unsigned

core/src/fpdfapi/fpdf_page/fpdf_page_pattern.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
 
 #include "core/src/fpdfapi/fpdf_page/pageint.h"
 
 #include <algorithm>
 
@@ skipping 155 matching lines @@
   m_pFuncs = pFuncs;
   m_nFuncs = nFuncs;
   m_pCS = pCS;
   CPDF_Dictionary* pDict = pShadingStream->GetDict();
   m_nCoordBits = pDict->GetIntegerBy("BitsPerCoordinate");
   m_nCompBits = pDict->GetIntegerBy("BitsPerComponent");
   m_nFlagBits = pDict->GetIntegerBy("BitsPerFlag");
   if (!m_nCoordBits || !m_nCompBits) {
     return FALSE;
   }
-  int nComps = pCS->CountComponents();
+  FX_DWORD nComps = pCS->CountComponents();
   if (nComps > 8) {
     return FALSE;
   }
   m_nComps = nFuncs ? 1 : nComps;
   if (((int)m_nComps < 0) || m_nComps > 8) {
     return FALSE;
   }
   m_CoordMax = m_nCoordBits == 32 ? -1 : (1 << m_nCoordBits) - 1;
   m_CompMax = (1 << m_nCompBits) - 1;
   CPDF_Array* pDecode = pDict->GetArrayBy("Decode");
@@ skipping 122 matching lines @@
       }
     }
     stream.m_BitStream.SkipBits(stream.m_nComps * stream.m_nCompBits *
                                 color_count);
     if (bGouraud)
       stream.m_BitStream.ByteAlign();
   }
   rect.Transform(pMatrix);
   return rect;
 }