From 885af0df9eb6b60710d54b26096036d482911b4a Mon Sep 17 00:00:00 2001
From: dirk <dirk@git.imagemagick.org>
Date: Tue, 27 Sep 2016 21:29:53 +0200
Subject: [PATCH] Fixed decreasing the number of packets.

---
 coders/sgi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/coders/sgi.c b/coders/sgi.c
index 0ccd9c031..8262a6c77 100644
--- a/coders/sgi.c
+++ b/coders/sgi.c
@@ -205,12 +205,12 @@ static MagickBooleanType SGIDecode(const size_t bytes_per_pixel,
           }
         else
           {
+            if (number_packets-- == 0)
+              return(MagickFalse);
             pixel=(size_t) (*p++) << 8;
             pixel|=(*p++);
             for ( ; count != 0; count--)
             {
-              if (number_packets-- == 0)
-                return(MagickFalse);
               *q=(unsigned char) (pixel >> 8);
               *(q+1)=(unsigned char) pixel;
               q+=8;
-- 
2.40.0