This fixes a number of things that are warnings in the Mac compiler....

import/cross/tar_processor.cc

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 44 matching lines @@
       if (bytes_read != bytes_to_read) {
         return -1;
       }
 
       header_bytes_read_ += bytes_to_read;
       bytes_to_consume -= bytes_to_read;
 
       if (header_bytes_read_ == TAR_HEADER_SIZE) {
         const char *filename = (const char *)header_;
 
-        // The tar format stupidly represents size_teger values as
+        // The tar format stupidly represents size_t integer values as
         // octal strings!!
-        size_t file_size = 0;
+        unsigned int file_size = 0u;
         sscanf(header_ + 124, "%o", &file_size);
 
         // Only callback client if this is a "real" header
         // (filename is not NULL)
         // Extra zero-padding can be added by the gzip compression
         // (at end of archive), so ignore these ones.
         //
         // Also, ignore entries for directories (which have zero size)
         if (header_[0] != 0 && file_size > 0) {
           ArchiveFileInfo info(filename, file_size);
@@ skipping 57 matching lines @@
         // setting to 0 makes us want more header bytes
         header_bytes_read_ = 0;
       }
     }
   }
 
   return 0;
 }
 
 }  // namespace o3d