[LyX/2.3.x] Skip insets when checking for uncodable chars to paste.

[Juergen Spitzmueller]

commit 6ce83844dc1a7572efec54ce386557a056517483
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Sat Feb 17 12:27:26 2018 +0100

    Skip insets when checking for uncodable chars to paste.
    
    Fixes paste of quote insets to ERT/chunk.
    
    (cherry picked from commit 8f9b733e6720c0709ea25c4bf56847e01faadd6f)
---
 src/CutAndPaste.cpp |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/CutAndPaste.cpp b/src/CutAndPaste.cpp
index f611d59..7c15845 100644
--- a/src/CutAndPaste.cpp
+++ b/src/CutAndPaste.cpp
@@ -168,6 +168,9 @@ pasteSelectionHelper(DocIterator const & cur, ParagraphList 
const & parlist,
                for (size_t i = 0; i != insertion.size(); ++i) {
                        pos_type end = insertion[i].size();
                        for (pos_type j = 0; j != end; ++j) {
+                               // skip insets
+                               if (insertion[i].isInset(j))
+                                       continue;
                                char_type const c = insertion[i].getChar(j);
                                if (!e->encodable(c)) {
                                        // do not track deletion