add some initialization and some assertion.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15554 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/src/BufferView.C b/src/BufferView.C
index 5b31f80b567bbca33edb3caaa838bf412b342ba2..ea667c43f95b50cac6bfcfa7fd202772c3fd15f6 100644 (file)
--- a/src/BufferView.C
+++ b/src/BufferView.C
@@ -123,7 +123,7 @@ T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 
 
 BufferView::BufferView()
-       : buffer_(0), wh_(0),
+       : buffer_(0), wh_(0), width_(0), height_(0),
          cursor_(*this),
          multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
          intl_(new Intl)
@@ -431,11 +431,14 @@ void BufferView::updateScrollbar()
                sumh += h2;
                nh++;
        }
+
+       BOOST_ASSERT(nh);
        int const hav = sumh / nh;
        // More realistic average paragraph height
        if (hav > wh_)
                wh_ = hav;
 
+       BOOST_ASSERT(h);
        scrollbarParameters_.height = (parsize + 1) * wh_;
        scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
        scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));