Fix : an access to uninitialized data.

[Log message beg]
Fix : an access to uninitialized data.

DETAILS :

1. pcpath->path_list was not reset when it is replaced with a rectangle.
   Bug 687178 "Infinite loop in ialloc_validate_memory".

2. Type 11 fonts got an occasional indeterministic data to pdata->Encoding,
   which were inaccurately checked for r_size() <= 256.

EXPECTED DIFFERENCES :

I did not detected any difference on Windows,
but I believe that the old code was indeterministic.
[Log message end]


Changes: 
 
 
 
*** f:\casper\HEAD\gs\src\gxcpath.c Fri Nov 14 01:27:27 2003
--- files\gs\src\gxcpath.c Thu Dec  4 02:49:04 2003
***************
*** 586,589 ****
--- 586,590 ----
   /* Release the existing path. */
   rc_decrement(pcpath->path_list, "gx_cpath_intersect");
+  pcpath->path_list = NULL;
   gx_path_new(&pcpath->path);
   ppath->bbox = new_box;
 
 
 
*** f:\casper\HEAD\gs\src\zbfont.c Sat Nov  1 01:12:43 2003
--- files\gs\src\zbfont.c Thu Dec  4 03:49:22 2003
***************
*** 448,457 ****
  {
      const ref *pfe = &pfont_data(pfont)->Encoding;
-     uint esize = r_size(pfe);
      int index = -1;
  
      pfont->encoding_index = index;
!     if (esize <= 256) {
   /* Look for an encoding that's "close". */
   int near_index = -1;
   uint best = esize / 3; /* must match at least this many */
--- 448,457 ----
  {
      const ref *pfe = &pfont_data(pfont)->Encoding;
      int index = -1;
  
      pfont->encoding_index = index;
!     if (r_type(pfe) == t_array && r_size(pfe) <= 256) {
   /* Look for an encoding that's "close". */
+  uint esize = r_size(pfe);
   int near_index = -1;
   uint best = esize / 3; /* must match at least this many */
***************
*** 567,570 ****
--- 567,571 ----
   if (!(options & bf_Encoding_optional))
       return_error(e_invalidfont);
+  pencoding = 0;
      } else {
   if (!r_is_array(pencoding))