Zero newly malloc'd address space, avoiding dereferencing a garbage pointer.

Found/patched by me, this version of the patch from upstream via Brad.

multimedia/swftools/Makefile

@@ -1,9 +1,9 @@
-# $OpenBSD: Makefile,v 1.2 2011/09/16 10:31:24 espie Exp $
+# $OpenBSD: Makefile,v 1.3 2011/10/26 20:17:42 sthen Exp $
 
 COMMENT=	SWF manipulation and generation utilities
 
 DISTNAME=	swftools-0.9.1
-REVISION=		0
+REVISION=	1
 CATEGORIES=	multimedia
 MASTER_SITES=	${HOMEPAGE}
 

multimedia/swftools/patches/patch-src_swfstrings_c

@@ -0,0 +1,12 @@
+$OpenBSD: patch-src_swfstrings_c,v 1.1 2011/10/26 20:17:42 sthen Exp $
+--- src/swfstrings.c.orig	Wed Oct 26 11:07:47 2011
++++ src/swfstrings.c	Wed Oct 26 10:59:47 2011
+@@ -208,7 +208,7 @@ int main (int argc,char ** argv)
+ 	if(!h) h = (swf.movieSize.ymax - swf.movieSize.ymin) / 20;
+     }
+ 
+-    id2tag = malloc(sizeof(TAG)*65536);
++    id2tag = rfx_calloc(sizeof(TAG)*65536);
+ 
+     fontnum = 0;
+     swf_FontEnumerate(&swf,&fontcallback1, 0);