[LyX/master] Do not rely on babel quotation macros for encodings other than [O]T1

[Juergen Spitzmueller]

commit 64b94f81be52de33553cda5db85d824de2119a3c
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Sun Dec 17 12:16:01 2017 +0100

    Do not rely on babel quotation macros for encodings other than [O]T1
    
    Babel falls back to OT1 in these cases, which gives wrong output got the
    guillemots
    
    Fixes: #10947
---
 src/insets/InsetQuotes.cpp |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/insets/InsetQuotes.cpp b/src/insets/InsetQuotes.cpp
index 24be900..00ce4d6 100644
--- a/src/insets/InsetQuotes.cpp
+++ b/src/insets/InsetQuotes.cpp
@@ -880,10 +880,12 @@ void InsetQuotes::latex(otexstream & os, OutputParams 
const & runparams) const
                // (ligatures not featured)
                qstr = quoteparams.getLaTeXQuote(quotechar, "int");
 #ifdef DO_USE_DEFAULT_LANGUAGE
-       } else if (doclang == "default") {
+       } else if ((doclang == "default"
 #else
-       } else if (!runparams.use_babel || runparams.isFullUnicode()) {
+       } else if ((!runparams.use_babel
 #endif
+                  || fontenc_ != "T1" || fontenc_ != "OT1")
+                  || runparams.isFullUnicode()) {
                // Standard quotation mark macros
                // These are also used by babel
                // without fontenc (XeTeX/LuaTeX)