[LyX/master] use enchant exception message accessor

[Stephan Witt]

commit f7418758ab6501171f732552c4f5d8eec3d11fe8
Author: Stephan Witt <sw...@lyx.org>
Date:   Tue Nov 18 22:06:11 2014 +0100

    use enchant exception message accessor

diff --git a/src/EnchantChecker.cpp b/src/EnchantChecker.cpp
index 6b53d2b..dc8ea4d 100644
--- a/src/EnchantChecker.cpp
+++ b/src/EnchantChecker.cpp
@@ -75,10 +75,11 @@ enchant::Dict * EnchantChecker::Private::addSpeller(string 
const & lang)
                LYXERR(Debug::FILES, "request enchant speller for language " << 
lang);
                m.speller = instance->request_dict(lang);
        }
-       catch (const enchant::Exception & e) {
+       catch (enchant::Exception & e) {
                // FIXME error handling?
-               // unfortunately the message of enchant::Exception is 
unreachable
-               LYXERR(Debug::FILES, "cannot add enchant speller, unspecified 
enchant exception in request_dict().");
+               const char * what = e.what();
+               LYXERR(Debug::FILES, "cannot add enchant speller: " <<
+                          ((what && *what) ? what : "unspecified enchant 
exception in request_dict()"));
                m.speller = 0;
        }
        spellers_[lang] = m;