another attempt to really fix bug 121650, this one is Ingo's suggestion.

CCBUGS: 121650

svn path=/branches/KDE/3.5/kdepim/; revision=578525

kmmessage.cpp

@@ -4013,7 +4013,7 @@ void KMMessage::updateBodyPart(const QString partSpecifier, const QByteArray & d
     {
       // update headers
       // get rid of EOL
-      content.resize( content.length()-2 );
+      content.resize( QMAX( content.length(), 2 ) - 2 );
       // we have to delete the fields first as they might have been created by
       // an earlier call to DwHeaders::FieldBody
       mLastUpdated->Headers().DeleteAllFields();