ofz#26000 don't bother with loop if nOrigPos is 0

Change-Id: I628bac1c06046155869417190c73d00140e85aff
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103539
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/filter/source/graphicfilter/itiff/itiff.cxx b/filter/source/graphicfilter/itiff/itiff.cxx
index 4a15becae1b8..7d62e3f45500 100644
--- a/filter/source/graphicfilter/itiff/itiff.cxx
+++ b/filter/source/graphicfilter/itiff/itiff.cxx
@@ -405,8 +405,11 @@ void TIFFReader::ReadTagData( sal_uInt16 nTagType, sal_uInt32 nDataLen)
                 try
                 {
                     aStripOffsets.resize(nDataLen);
-                    for (size_t i = 0; i < nOldNumSO; ++i)
-                        aStripOffsets[i] += nOrigPos;
+                    if (nOrigPos)
+                    {
+                        for (size_t i = 0; i < nOldNumSO; ++i)
+                            aStripOffsets[i] += nOrigPos;
+                    }
                     for (size_t i = nOldNumSO; i < aStripOffsets.size(); ++i)
                         aStripOffsets[i] = ReadIntData() + nOrigPos;
                 }