Fix uninitialized nresults and RGB

core/src/fpdfapi/fpdf_render/fpdf_render_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 "../../../include/fpdfapi/fpdf_render.h"
 #include "../../../include/fpdfapi/fpdf_pageobj.h"
 #include "../../../include/fxge/fx_ge.h"
 #include "../fpdf_page/pageint.h"
@@ skipping 692 matching lines @@
             Coon_Color tempColors[2];
             tempColors[0] = patch.patch_colors[flag];
             tempColors[1] = patch.patch_colors[(flag + 1) % 4];
             FXSYS_memcpy32(patch.patch_colors, tempColors, sizeof(Coon_Color) * 2);
         }
         for (i = iStartPoint; i < point_count; i ++) {
             stream.GetCoords(coords[i].x, coords[i].y);
             pObject2Bitmap->Transform(coords[i].x, coords[i].y);
         }
         for (i = iStartColor; i < 4; i ++) {
-            FX_FLOAT r, g, b;
+            FX_FLOAT r=0.0f, g=0.0f, b=0.0f;
             stream.GetColor(r, g, b);
             patch.patch_colors[i].comp[0] = (FX_INT32)(r * 255);
             patch.patch_colors[i].comp[1] = (FX_INT32)(g * 255);
             patch.patch_colors[i].comp[2] = (FX_INT32)(b * 255);
         }
         CFX_FloatRect bbox = CFX_FloatRect::GetBBox(coords, point_count);
         if (bbox.right <= 0 || bbox.left >= (FX_FLOAT)pBitmap->GetWidth() || bbox.top <= 0 ||
                 bbox.bottom >= (FX_FLOAT)pBitmap->GetHeight()) {
             continue;
         }
@@ skipping 360 matching lines @@
             bStroke = FALSE;
             bPattern = TRUE;
         }
     }
 #ifdef _FPDFAPI_MINI_
     if (bPattern && m_DitherBits) {
         DitherObjectArea(pPathObj, pObj2Device);
     }
 #endif
 }