[LyX/master] Center longtable explicitly (#10690)

[Scott Kostyshak]

commit bde1834f7e81727545e014c24e27e148f6ba7d65
Author: Scott Kostyshak <skost...@lyx.org>
Date:   Tue May 8 11:18:07 2018 -0400

    Center longtable explicitly (#10690)
    
    "Center" is the default of longtable, but some situations require it
    to be centered explicitly, such as when using floatrow:
    
    
https://tex.stackexchange.com/questions/320592/floatrow-package-conflicting-with-centering-longtable
---
 src/insets/InsetTabular.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/insets/InsetTabular.cpp b/src/insets/InsetTabular.cpp
index ee66686..67da03e 100644
--- a/src/insets/InsetTabular.cpp
+++ b/src/insets/InsetTabular.cpp
@@ -2777,6 +2777,7 @@ void Tabular::latex(otexstream & os, OutputParams const & 
runparams) const
                        os << "[l]";
                        break;
                case LYX_LONGTABULAR_ALIGN_CENTER:
+                       os << "[c]";
                        break;
                case LYX_LONGTABULAR_ALIGN_RIGHT:
                        os << "[r]";