Bug fix for binary saving

[John W. Eaton]

On 18-Dec-2006, Michael Goffioul wrote:

| Using a signed char to load an octave binary file leads to a wrong detection
| of the type flag: -1 instead of 255. The attached patch solves the problem.
| 
| Michael.
| 
| Index: src/ls-oct-binary.cc
| ===================================================================
| RCS file: /cvs/octave/src/ls-oct-binary.cc,v
| retrieving revision 1.10
| diff -c -r1.10 ls-oct-binary.cc
| *** src/ls-oct-binary.cc      23 May 2006 06:05:14 -0000      1.10
| --- src/ls-oct-binary.cc      18 Dec 2006 13:24:16 -0000
| ***************
| *** 139,145 ****
|   {
|     std::string retval;
|   
| !   char tmp = 0;
|   
|     int32_t name_len = 0;
|     int32_t doc_len = 0;
| --- 139,145 ----
|   {
|     std::string retval;
|   
| !   unsigned char tmp = 0;
|   
|     int32_t name_len = 0;
|     int32_t doc_len = 0;

I made this change.

Thanks,

jwe