handle no content comment block in the gif.staging/cm-12.0-cafstaging/cm-12.0

Change-Id: I3c87a151b0d0f487865c4f84d26101797bc91290
Signed-off-by: Joey Pan <joey.pan@mediatek.com>
(cherry picked from commit 7ee131f83daab0744dbbfbbf2f375c05a5285f2e)

1 files changed, 3 insertions, 1 deletions

diff --git a/dgif_lib.c b/dgif_lib.c
index c7ff504..744a2f9 100644
--- a/dgif_lib.c
+++ b/dgif_lib.c
@@ -1134,11 +1134,13 @@ DGifSlurp(GifFileType *GifFile)
               if (DGifGetExtension(GifFile,&ExtFunction,&ExtData) == GIF_ERROR)
                   return (GIF_ERROR);
 	      /* Create an extension block with our data */
-	      if (GifAddExtensionBlock(&GifFile->ExtensionBlockCount,
+              if (ExtData != NULL) {
+	          if (GifAddExtensionBlock(&GifFile->ExtensionBlockCount,
 				       &GifFile->ExtensionBlocks, 
 				       ExtFunction, ExtData[0], &ExtData[1])
 		  == GIF_ERROR)
 		  return (GIF_ERROR);
+              }
               while (ExtData != NULL) {
                   if (DGifGetExtensionNext(GifFile, &ExtData) == GIF_ERROR)
                       return (GIF_ERROR);