handle no content comment block in the gif.android-wear-5.1.1_r1android-wear-5.1.0_r1android-wear-5.0.0_r1android-m-preview-2android-m-preview-1android-m-previewandroid-cts-5.1_r9android-cts-5.1_r8android-cts-5.1_r7android-cts-5.1_r6android-cts-5.1_r5android-cts-5.1_r4android-cts-5.1_r3android-cts-5.1_r28android-cts-5.1_r27android-cts-5.1_r26android-cts-5.1_r25android-cts-5.1_r24android-cts-5.1_r23android-cts-5.1_r22android-cts-5.1_r21android-cts-5.1_r20android-cts-5.1_r2android-cts-5.1_r19android-cts-5.1_r18android-cts-5.1_r17android-cts-5.1_r16android-cts-5.1_r15android-cts-5.1_r14android-cts-5.1_r13android-cts-5.1_r10android-cts-5.1_r1android-cts-5.0_r9android-cts-5.0_r8android-cts-5.0_r7android-cts-5.0_r6android-cts-5.0_r5android-cts-5.0_r4android-cts-5.0_r3android-5.1.1_r9android-5.1.1_r8android-5.1.1_r7android-5.1.1_r6android-5.1.1_r5android-5.1.1_r4android-5.1.1_r38android-5.1.1_r37android-5.1.1_r36android-5.1.1_r35android-5.1.1_r34android-5.1.1_r33android-5.1.1_r30android-5.1.1_r3android-5.1.1_r29android-5.1.1_r28android-5.1.1_r26android-5.1.1_r25android-5.1.1_r24android-5.1.1_r23android-5.1.1_r22android-5.1.1_r20android-5.1.1_r2android-5.1.1_r19android-5.1.1_r18android-5.1.1_r17android-5.1.1_r16android-5.1.1_r15android-5.1.1_r14android-5.1.1_r13android-5.1.1_r12android-5.1.1_r10android-5.1.1_r1android-5.1.0_r5android-5.1.0_r4android-5.1.0_r3android-5.1.0_r1android-5.0.2_r3android-5.0.2_r1android-5.0.1_r1android-5.0.0_r7android-5.0.0_r6android-5.0.0_r5.1android-5.0.0_r5android-5.0.0_r4android-5.0.0_r3android-5.0.0_r2android-5.0.0_r1master-soonglollipop-wear-releaselollipop-releaselollipop-mr1-wfc-releaselollipop-mr1-releaselollipop-mr1-fi-releaselollipop-mr1-devlollipop-mr1-cts-releaselollipop-devlollipop-cts-release

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);