[LyX/master] Revert 6a5aa1ca

[Enrico Forestieri]

commit 2af17f8f89e81b1be98748a354454b079b8b65d3
Author: Enrico Forestieri <for...@lyx.org>
Date:   Sat Jul 12 19:52:12 2014 +0200

    Revert 6a5aa1ca
    
    That commit is obsoleted by 5bd14af8.

diff --git a/src/LaTeXFonts.cpp b/src/LaTeXFonts.cpp
index 9010615..676179f 100644
--- a/src/LaTeXFonts.cpp
+++ b/src/LaTeXFonts.cpp
@@ -259,9 +259,8 @@ string const LaTeXFont::getPackageOptions(bool ot1, bool 
complete, bool sc, bool
            && providesScale(ot1, complete, nomath)) {
                if (!os.str().empty())
                        os << ',';
-               ostringstream value;
-               value << float(scale) / 100;
-               os << subst(to_ascii(scaleoption_), "$$val", value.str());
+               os << subst(to_ascii(scaleoption_), "$$val",
+                           convert<std::string>(float(scale) / 100));
        }
        return os.str();
 }