[LyX/master] Fixup 17571104: really avoid empty numbers in toc

[Jean-Marc Lasgouttes]

commit 5a22b2e391437b6855ed305b468bdbd61735bd0a
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Mon Jul 1 12:05:31 2019 +0200

    Fixup 17571104: really avoid empty numbers in toc
    
    For some reason, I missed this one when trying to fix the bug.
    
    Fixes bug #11423.
---
 src/mathed/InsetMathHull.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mathed/InsetMathHull.cpp b/src/mathed/InsetMathHull.cpp
index 04b47d5..c035e49 100644
--- a/src/mathed/InsetMathHull.cpp
+++ b/src/mathed/InsetMathHull.cpp
@@ -213,7 +213,7 @@ InsetMathHull::InsetMathHull(Buffer * buf)
 
 
 InsetMathHull::InsetMathHull(Buffer * buf, HullType type)
-       : InsetMathGrid(buf, getCols(type), 1), type_(type), numbered_(1, 
NUMBER),
+       : InsetMathGrid(buf, getCols(type), 1), type_(type), numbered_(1, 
NONUMBER),
          numbers_(1, empty_docstring()), label_(1, dummy_pointer),
          preview_(new RenderPreview(this))
 {