[gimp] file-gif-load: Fail early if GetCode() fails (Bug #737375)

[Mukund Sivaraman <muks src gnome org>]

commit 55150487ff9ed53ecb90ae4fca3d615e24057fae
Author: Mukund Sivaraman <muks banu com>
Date:   Thu Sep 25 22:48:33 2014 +0530

    file-gif-load: Fail early if GetCode() fails (Bug #737375)

 plug-ins/common/file-gif-load.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/plug-ins/common/file-gif-load.c b/plug-ins/common/file-gif-load.c
index 084ad27..b07a20a 100644
--- a/plug-ins/common/file-gif-load.c
+++ b/plug-ins/common/file-gif-load.c
@@ -746,7 +746,10 @@ LZWReadByte (FILE *fd,
       max_code_size = 2 * clear_code;
       max_code      = clear_code + 2;
 
-      GetCode (fd, 0, TRUE);
+      if (GetCode (fd, 0, TRUE) < 0)
+        {
+          return -1;
+        }
 
       fresh = TRUE;