commit d1d3f755484d500550d70fc025e3a4a4e6c0a2a8
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Tue May 29 15:18:01 2018 +0200

    Fixup dd79338c: avoid hypothetical division by zero
    
    Spotted by Coverity.
---
 src/frontends/qt4/GuiView.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index 47a5688..4357389 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -220,7 +220,7 @@ public:
                }
                // The longest line in the reference font (for English)
                // is 180. Calculate scale factor from that.
-               double const wscale = (180.0 / wline);
+               double const wscale = wline > 0 ? (180.0 / wline) : 1;
                // Now do the same for the height (necessary for condensed 
fonts)
                double const hscale = (34.0 / hline);
                // take the lower of the two scale factors.

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