[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [39726] trunk/blender/source/blender/ blenkernel/intern/library.c: subtraction on unsigned values didnt work as intended for copying ID's.

[Campbell Barton]

Revision: 39726
          
http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=39726
Author:   campbellbarton
Date:     2011-08-27 02:45:35 +0000 (Sat, 27 Aug 2011)
Log Message:
-----------
subtraction on unsigned values didnt work as intended for copying ID's.

Modified Paths:
--------------
    trunk/blender/source/blender/blenkernel/intern/library.c

Modified: trunk/blender/source/blender/blenkernel/intern/library.c
===================================================================
--- trunk/blender/source/blender/blenkernel/intern/library.c    2011-08-27 
02:04:29 UTC (rev 39725)
+++ trunk/blender/source/blender/blenkernel/intern/library.c    2011-08-27 
02:45:35 UTC (rev 39726)
@@ -671,7 +671,7 @@
        assert(idn != NULL);
 
        idn_len= MEM_allocN_len(idn);
-       if(idn_len - sizeof(ID) > 0) {
+       if((ssize_t)idn_len - (ssize_t)sizeof(ID) > 0) { /* signed to allow neg 
result */
                cp= (char *)id;
                cpn= (char *)idn;
                memcpy(cpn+sizeof(ID), cp+sizeof(ID), idn_len - sizeof(ID));

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