Remove few more errors in mac scons build.

webkit/port/platform/image-decoders/gif/GIFImageReader.h

 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
@@ skipping 147 matching lines @@
     unsigned bytes_to_consume;         /* Number of bytes to accumulate */
     unsigned bytes_in_hold;            /* bytes accumulated so far*/
     unsigned char hold[MAX_HOLD_SIZE]; /* Accumulation buffer */
     unsigned char* global_colormap;    /* (3* MAX_COLORS in size) Default colormap if local not supplied, 3 bytes for each color  */
     
      /* Global (multi-image) state */
     int screen_bgcolor;         /* Logical screen background color */
     int version;                /* Either 89 for GIF89 or 87 for GIF87 */
     unsigned screen_width;       /* Logical screen width & height */
     unsigned screen_height;
-    int global_colormap_size;   /* Size of global colormap array. */
-    int images_decoded;         /* Counts completed frames for animated GIFs */
-    int images_count;           /* Counted all frames seen so far (including incomplete frames) */
-    int loop_count;             /* Netscape specific extension block to control
-                                   the number of animation loops a GIF renders. */
+    int global_colormap_size;    /* Size of global colormap array. */
+    unsigned int images_decoded; /* Counts completed frames for animated GIFs */
+    int images_count;            /* Counted all frames seen so far (including incomplete frames) */
+    int loop_count;              /* Netscape specific extension block to control
+                                    the number of animation loops a GIF renders. */
     
     // Not really global, but convenient to locate here.
     int count;                  /* Remaining # bytes in sub-block */
     
     GIFFrameReader* frame_reader;
 
     GIFImageReader(WebCore::GIFImageDecoder* client = 0) {
         clientptr = client;
         state = gif_type;
         bytes_to_consume = 6;
@@ skipping 22 matching lines @@
     bool read(const unsigned char * buf, unsigned int numbytes, 
               WebCore::GIFImageDecoder::GIFQuery query = WebCore::GIFImageDecoder::GIFFullQuery, unsigned haltAtFrame = -1);
 
 private:
     void output_row();
     int do_lzw(const unsigned char *q);
 };
 
 #endif