[AD] datedit fix

[Elias Pschernig <elias@xxxxxxxxxx>]

Attached is a fix for a bug which caused access to freed memory in
grabber (causing random crashes for me when using the update command).
Going to apply to 4.1.x and 4.0.x.

-- 
Elias Pschernig

Index: tools/datedit.c
===================================================================
RCS file: /cvsroot/alleg/allegro/tools/datedit.c,v
retrieving revision 1.33
diff -u -r1.33 datedit.c
--- tools/datedit.c	29 Nov 2003 08:32:35 -0000	1.33
+++ tools/datedit.c	18 Sep 2004 12:47:42 -0000
@@ -1532,16 +1532,22 @@
 static DATAFILE_PROPERTY *clone_properties(DATAFILE_PROPERTY *prop)
 {
    DATAFILE_PROPERTY *clone, *iter;
-   int size = 0;
+   int size = 0, i;
 
    if (!prop)
       return NULL;
 
-   for (iter = prop; iter->type != DAT_END; iter++)
+   for (iter = prop; iter->type != DAT_END; iter++) {
       size++;
+   }
 
    clone = _al_malloc(sizeof(DATAFILE_PROPERTY)*(size+1));
-   memcpy(clone, prop, sizeof(DATAFILE_PROPERTY)*(size+1));
+
+   for (i = 0; i <= size; i++) {
+       clone[i].type = prop[i].type;
+       if (prop[i].dat)
+          clone[i].dat = ustrdup(prop[i].dat);
+   }
 
    return clone;
 }