[gcc 4.x] Fix the broken build reported due to uninitialized |status| variable.

Source/platform/image-decoders/jpeg/JPEGImageDecoder.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * Portions are Copyright (C) 2001-6 mozilla.org
  *
  * Other contributors:
  *   Stuart Parmenter <stuart@mozilla.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 518 matching lines @@
                     return false; // I/O suspension.
 
                 // If we've completed image output...
                 ASSERT(m_info.output_scanline == m_info.output_height);
                 m_state = JPEG_DONE;
             }
         // FALL THROUGH
 
         case JPEG_DECOMPRESS_PROGRESSIVE:
             if (m_state == JPEG_DECOMPRESS_PROGRESSIVE) {
-                int status;
+                int status = 0;
                 do {
                     decoder_error_mgr* err = reinterpret_cast_ptr<decoder_error_mgr *>(m_info.err);
                     if (err->num_corrupt_warnings)
                         break;
                     status = jpeg_consume_input(&m_info);
                 } while ((status != JPEG_SUSPENDED) && (status != JPEG_REACHED_EOI));
 
                 for (;;) {
                     if (!m_info.output_scanline) {
                         int scan = m_info.input_scan_number;
@@ skipping 442 matching lines @@
     // has failed.
     if (!m_reader->decode(*m_data, onlySize) && isAllDataReceived())
         setFailed();
 
     // If decoding is done or failed, we don't need the JPEGImageReader anymore.
     if (isComplete(this, onlySize) || failed())
         m_reader.clear();
 }
 
 }