[PATCH] fdo#36329: Fix crash reading some documents with fields

[Cédric Bosdonnat]

The problem came from the unsigned integer positions... Needed to
prevent the end position to get -1/max value.
---
 sw/source/core/crsr/bookmrk.cxx |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/sw/source/core/crsr/bookmrk.cxx b/sw/source/core/crsr/bookmrk.cxx
index 0619118..2b2af4f 100644
--- a/sw/source/core/crsr/bookmrk.cxx
+++ b/sw/source/core/crsr/bookmrk.cxx
@@ -84,7 +84,8 @@ namespace
             rStart.nNode.GetNode().GetTxtNode();
         SwTxtNode const*const pEndTxtNode = rEnd.nNode.GetNode().GetTxtNode();
         const sal_Unicode ch_start=pStartTxtNode->GetTxt().GetChar(rStart.nContent.GetIndex());
-        xub_StrLen nEndPos = rEnd == rStart ? rEnd.nContent.GetIndex() : rEnd.nContent.GetIndex() - 1;
+        xub_StrLen nEndPos = ( rEnd == rStart ||  rEnd.nContent.GetIndex() == 0 ) ?
+            rEnd.nContent.GetIndex() : rEnd.nContent.GetIndex() - 1;
         const sal_Unicode ch_end=pEndTxtNode->GetTxt().GetChar( nEndPos );
         SwPaM aStartPaM(rStart);
         SwPaM aEndPaM(rEnd);
-- 
1.7.3.4


--=-ofv6cWtEuLA6Nr9biu1A--