Fix some -Wmaybe-uninitialized errors.

core/src/fxge/ge/fx_ge_fontmap.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 <limits>
 
 #include "../../../include/fxge/fx_ge.h"
 #include "../../../include/fxge/fx_freetype.h"
@@ skipping 1444 matching lines @@
   }
   CFX_FontFaceInfo* pFont = (CFX_FontFaceInfo*)hFont;
   FXSYS_FILE* pFile = NULL;
   if (size > 0) {
     pFile = FXSYS_fopen(pFont->m_FilePath, "rb");
     if (pFile == NULL) {
       return 0;
     }
   }
   FX_DWORD datasize = 0;
-  FX_DWORD offset;
+  FX_DWORD offset = 0;
   if (table == 0) {
     datasize = pFont->m_FontOffset ? 0 : pFont->m_FileSize;
-    offset = 0;
   } else if (table == 0x74746366) {
     datasize = pFont->m_FontOffset ? pFont->m_FileSize : 0;
-    offset = 0;
   } else {
     FX_DWORD nTables = pFont->m_FontTables.GetLength() / 16;
     for (FX_DWORD i = 0; i < nTables; i++) {
       const uint8_t* p = (const uint8_t*)pFont->m_FontTables + i * 16;
       if (GET_TT_LONG(p) == table) {

[Lei Zhang, 2015/08/18 20:10:32]

|offset| may not be initialized

[Tom Sepez, 2015/08/18 20:20:50]

Ok, probably an error to continue if one of the above paths not taken, but
nevermind.

         offset = GET_TT_LONG(p + 8);
         datasize = GET_TT_LONG(p + 12);
       }
     }
   }
   if (datasize && size >= datasize && pFile) {
     FXSYS_fseek(pFile, offset, FXSYS_SEEK_SET);
     FXSYS_fread(buffer, datasize, 1, pFile);
   }
   if (pFile) {
     FXSYS_fclose(pFile);
   }
   return datasize;
 }
 void CFX_FolderFontInfo::DeleteFont(void* hFont) {}
 FX_BOOL CFX_FolderFontInfo::GetFaceName(void* hFont, CFX_ByteString& name) {
   if (hFont == NULL) {
     return FALSE;
   }
   CFX_FontFaceInfo* pFont = (CFX_FontFaceInfo*)hFont;
   name = pFont->m_FaceName;
   return TRUE;
 }
 FX_BOOL CFX_FolderFontInfo::GetFontCharset(void* hFont, int& charset) {
   return FALSE;
 }