Prevent targaenc.c from outputting trash byte.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13059 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/targaenc.c

@@ -87,7 +87,7 @@ static int targa_encode_frame(AVCodecContext *avctx,
     p->key_frame= 1;
 
     /* zero out the header and only set applicable fields */
-    memset(outbuf, 0, 11);
+    memset(outbuf, 0, 12);
     AV_WL16(outbuf+12, avctx->width);
     AV_WL16(outbuf+14, avctx->height);
     outbuf[17] = 0x20;           /* origin is top-left. no alpha */