[LyX/2.3.x] Fix assertion when checking if change in selection

[Scott Kostyshak]

commit 4ea6d81437ec7b5bea165d78ca37cb163e262042
Author: Scott Kostyshak <skost...@lyx.org>
Date:   Fri Dec 28 10:40:38 2018 -0500

    Fix assertion when checking if change in selection
    
    The check for the iterator being in the same paragraph as the end of
    selection was incorrect, because paragraphs in different cells could
    have the same pit. We now additionally condition on having the same
    idx.
    
    This commit amends d1279875 (and thus 23de5e5e).
    
    For discussion, see:
    
      
https://www.mail-archive.com/search?l=mid&q=a5afd0c01a0eb9a84fd4d050d15eb23016d6f38a.camel%40lyx.org
    
    Thanks to Jürgen.
    
    (cherry picked from commit c5301a6495b108df5b307da39dad5be65926f76b)
---
 src/Text3.cpp |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/Text3.cpp b/src/Text3.cpp
index b5f9e33..8bd5d10 100644
--- a/src/Text3.cpp
+++ b/src/Text3.cpp
@@ -3210,7 +3210,8 @@ bool Text::getStatus(Cursor & cur, FuncRequest const & 
cmd,
                        for (DocIterator it = cur.selectionBegin(); ; 
it.forwardPar()) {
                                pos_type const beg = it.pos();
                                pos_type end;
-                               bool const in_last_par = (it.pit() == 
cur.selectionEnd().pit());
+                               bool const in_last_par = (it.pit() == 
cur.selectionEnd().pit() &&
+                                                         it.idx() == 
cur.selectionEnd().idx());
                                if (in_last_par)
                                        end = cur.selectionEnd().pos();
                                else