updated/corrected documentation

[swftools.git] / src / swfextract.c

diff --git a/src/swfextract.c b/src/swfextract.c
index 723c599..a5f549a 100644 (file)
--- a/src/swfextract.c
+++ b/src/swfextract.c
@@ -4,8 +4,20 @@
    Part of the swftools package.
    
    Copyright (c) 2001 Matthias Kramm <kramm@quiss.org>
+ 
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
 
-   This file is distributed under the GPL, see file COPYING for details */
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
 #include <unistd.h>
 #include <stdio.h>
@@ -273,7 +285,9 @@ void extractTag(SWF*swf, char*filename)
        changed = 0;
        for(t=0;t<65536;t++) {
           if(used[t] && !(used[t]&2)) {
-            if(tags[t]->id==ST_DEFINESPRITE) {
+            if(tags[t]==0) {
+                msg("<warning> ID %d is referenced, but never defined.", t);
+            } else if(tags[t]->id==ST_DEFINESPRITE) {
                 TAG*tag = tags[t];
                 while(tag->id != ST_END)
                 {