libtiff: tif_dirread.c: silence Coverity Scan false positive warnings about out-of-bounds access (CID 1491182, 1491186)

SDL Commits
1 
From 3b727a6b17db9d8a0d2fd8a0f8cc3162df442681 Mon Sep 17 00:00:00 2001
From: Even Rouault <[EMAIL REDACTED]>
Date: Tue, 16 Aug 2022 10:40:07 +0200
Subject: [PATCH] tif_dirread.c: silence Coverity Scan false positive warnings
 about out-of-bounds access (CID 1491182, 1491186)

---
 libtiff/tif_dirread.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c
index 8f3fc28d..1a45b35b 100644
--- a/libtiff/tif_dirread.c
+++ b/libtiff/tif_dirread.c
@@ -6978,9 +6978,11 @@ static int _TIFFFetchStrileValue(TIFF* tif,
         {
             td->td_stripoffsetbyteallocsize = nStripArrayAllocNew;
             /* Initialize new entries to ~0 / -1 */
+            /* coverity[overrun-buffer-arg] */
             memset(td->td_stripoffset_p + nStripArrayAllocBefore,
                 0xFF,
                 (td->td_stripoffsetbyteallocsize - nStripArrayAllocBefore) * sizeof(uint64_t) );
+            /* coverity[overrun-buffer-arg] */
             memset(td->td_stripbytecount_p + nStripArrayAllocBefore,
                 0xFF,
                 (td->td_stripoffsetbyteallocsize - nStripArrayAllocBefore) * sizeof(uint64_t) );