avcodec/flashsv2enc: Fix undefined NULL + 0

Affected the vsynth*-flashsv2 FATE-tests.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

diff --git a/libavcodec/flashsv2enc.c b/libavcodec/flashsv2enc.c
index 430b6806c8828bc2e891592b94d73c867322e500..00aedf07953d34d92035729b2a71bedaf2330343 100644 (file)
--- a/libavcodec/flashsv2enc.c
+++ b/libavcodec/flashsv2enc.c
@@ -159,7 +159,7 @@ static void init_blocks(FlashSV2Context * s, Block * blocks,
             b->enc   = encbuf;
             b->data  = databuf;
             encbuf  += b->width * b->height * 3;
-            databuf += !databuf ? 0 : b->width * b->height * 6;
+            databuf  = databuf ? databuf + b->width * b->height * 6 : NULL;
         }
     }
 }