fix compilation when libmagic is not used

diff --git a/src/support/Magic.h b/src/support/Magic.h
index ca87f0cc14a71c3af92cfd27c9b1816586e2f4db..69ea3a66fe0f9eed56ed789da4706634be7c4203 100644 (file)
--- a/src/support/Magic.h
+++ b/src/support/Magic.h
@@ -67,7 +67,7 @@ public:
                LYXERR(Debug::GRAPHICS, "Magic: libmagic support not configured");
        }
 
-       std::string file(std::string const & name) const { return empty_string; }
+       std::string file(std::string const & ) const { return empty_string(); }
 };
 
 #endif // HAVE_MAGIC_T